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Versions: (draft-bjorklund-netmod-snmp-cfg) 00 01 02 03 04 05 06 07 08 RFC 7407

Network Working Group                                       M. Bjorklund
Internet-Draft                                            Tail-f Systems
Intended status: Standards Track                        J. Schoenwaelder
Expires: August 15, 2013                               Jacobs University
                                                       February 11, 2013


                A YANG Data Model for SNMP Configuration
                     draft-ietf-netmod-snmp-cfg-01

Abstract

   This document defines a collection of YANG definitions for
   configuring SNMP engines.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 15, 2013.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.





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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Data Model . . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  General Considerations . . . . . . . . . . . . . . . . . .  4
     2.2.  Common Definitions . . . . . . . . . . . . . . . . . . . .  4
     2.3.  Engine Configuration . . . . . . . . . . . . . . . . . . .  4
     2.4.  Target Configuration . . . . . . . . . . . . . . . . . . .  5
     2.5.  Notification Configuration . . . . . . . . . . . . . . . .  6
     2.6.  Proxy Configuration  . . . . . . . . . . . . . . . . . . .  7
     2.7.  Community Configuration  . . . . . . . . . . . . . . . . .  7
     2.8.  View-based Access Control Model Configuration  . . . . . .  9
     2.9.  User-based Security Model Configuration  . . . . . . . . .  9
     2.10. Transport Security Model Configuration . . . . . . . . . . 11
     2.11. Transport Layer Security Transport Model Configuration . . 12
     2.12. Secure Shell Transport Model Configuration . . . . . . . . 13
   3.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . . 14
     3.1.  Module 'ietf-snmp' . . . . . . . . . . . . . . . . . . . . 14
     3.2.  Submodule 'ietf-snmp-common' . . . . . . . . . . . . . . . 16
     3.3.  Submodule 'ietf-snmp-engine' . . . . . . . . . . . . . . . 20
     3.4.  Submodule 'ietf-snmp-target' . . . . . . . . . . . . . . . 23
     3.5.  Submodule 'ietf-snmp-notification' . . . . . . . . . . . . 27
     3.6.  Submodule 'ietf-snmp-proxy'  . . . . . . . . . . . . . . . 31
     3.7.  Submodule 'ietf-snmp-community'  . . . . . . . . . . . . . 33
     3.8.  Submodule 'ietf-snmp-vacm' . . . . . . . . . . . . . . . . 38
     3.9.  Submodule 'ietf-snmp-usm'  . . . . . . . . . . . . . . . . 44
     3.10. Submodule 'ietf-snmp-tsm'  . . . . . . . . . . . . . . . . 48
     3.11. Submodule 'ietf-snmp-tls'  . . . . . . . . . . . . . . . . 50
     3.12. Submodule 'ietf-snmp-ssh'  . . . . . . . . . . . . . . . . 56
   4.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 59
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . . 61
   6.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 62
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 63
     7.1.  Normative References . . . . . . . . . . . . . . . . . . . 63
     7.2.  Informative References . . . . . . . . . . . . . . . . . . 63
   Appendix A.  Example configurations  . . . . . . . . . . . . . . . 65
     A.1.  Engine Configuration Example . . . . . . . . . . . . . . . 65
     A.2.  Community Configuration Example  . . . . . . . . . . . . . 65
     A.3.  User-based Security Model Configuration Example  . . . . . 66
     A.4.  Target and Notification Configuration Example  . . . . . . 67
     A.5.  Proxy Configuration Example  . . . . . . . . . . . . . . . 69
     A.6.  View-based Access Control Model Configuration Example  . . 71
     A.7.  Transport Layer Security Transport Model Configuration
           Example  . . . . . . . . . . . . . . . . . . . . . . . . . 73
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 75






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1.  Introduction

   This document defines a YANG [RFC6020] data model for the
   configuration of SNMP engines.  The configuration model is consistent
   with the MIB modules defined in [RFC3411], [RFC3412], [RFC3413],
   [RFC3414], [RFC3415], [RFC3418], [RFC3584], [RFC5591], [RFC5592], and
   [RFC6353] but takes advantage of YANG's ability to define
   hierarchical configuration data models.  The structure of the model
   has been derived from existing proprietary configuration models
   implemented as command line interfaces.

   The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14, [RFC2119].




































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2.  Data Model

   In order to preserve the modularity of SNMP, the YANG configuration
   data model is organized in a set of YANG submodules, all sharing the
   same module namespace.  This allows to add configuration support for
   additional SNMP features while keeping the number of namespaces that
   have to be dealt with down to a minimum.

2.1.  General Considerations

   Most YANG nodes are mapped 1-1 to the corresponding MIB object.  The
   "reference" statement is used to indicate which corresponding MIB
   object the YANG node is mapped to.  When there is not a simple 1-1
   mapping, the "description" statement explains the mapping.

2.2.  Common Definitions

   The submodule "ietf-snmp-common" defines a set of common typedefs,
   features, and the top-level container "snmp".  All configuration
   parameters defined in the other submodules are organized under this
   top-level container.

   This submodule defines five YANG features:

   proxy:  A server implements this feature if it can act as an SNMP
      Proxy.

   notification-filter:  A server implements this feature if it supports
      SNMP notification filtering.

   tsm:  A server implements this feature if it supports the Transport
      Security Model (tsm) [RFC5591].

   sshtm:  A server implements this feature if it supports the Secure
      Shell (SSH) Transport Model (sshtm) [RFC5592].

   tlstm:  A server implements this feature if it supports the Transport
      Layer Security (TLS) Transport Model (tlstm) [RFC6353].

2.3.  Engine Configuration

   The submodule "ietf-snmp-engine", which defines configuration
   parameters that are specific to SNMP engines, has the following
   structure:







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      +--rw snmp
         +--rw engine
            +--rw enabled?     boolean
            +--rw listen
            |  +--rw udp [ip port]
            |     +--rw ip      inet:ip-address
            |     +--rw port    inet:port-number
            +--rw version
            |  +--rw v1?    empty
            |  +--rw v2c?   empty
            |  +--rw v3?    empty
            +--rw engine-id?   snmp:engine-id

   The leaf "/snmp/engine/enabled" can be used to enable/disable an SNMP
   engine.

   The container "/snmp/engine/listen" provides configuration of the
   transport endpoints the engine is listening to.  In this submodule,
   SNMP over UDP is defined.  TLS and Datagram Transport Layer Security
   (DTLS) are also supported, defined in "ietf-snmp-tls" (Section 2.11).
   The "listen" container is expected to be augmented for other
   transports.

   The "/snmp/engine/version" container can be used to enable/disable
   the different message processing models.

2.4.  Target Configuration

   The submodule "ietf-snmp-target", which defines configuration
   parameters that correspond to the objects in SNMP-TARGET-MIB, has the
   following structure:

      +--rw snmp
         +--rw target [name]
            +--rw name       snmp:identifier
            +--rw (transport)
            |  +--:(udp)
            |     +--rw udp
            |        +--rw ip               inet:ip-address
            |        +--rw port?            inet:port-number
            |        +--rw prefix-length?   uint8
            +--rw tag*       snmp:identifier
            +--rw timeout?   uint32
            +--rw retries?   uint8
            +--rw (params)?

   An entry in the list "/snmp/target" corresponds to an
   "snmpTargetAddrEntry".



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   The "snmpTargetAddrTDomain" and "snmpTargetAddrTAddress" objects are
   mapped to transport-specific YANG nodes.  Each transport is
   configured as a separate case in the "transport" choice.  In this
   submodule, SNMP over UDP is defined.  TLS and DTLS are also
   supported, defined in "ietf-snmp-tls" (Section 2.11).  The
   "transport" choice is expected to be augmented for other transports.

   In order to provide a simpler configuration model with less cross-
   references, the "target" list also inlines the
   "snmpTargetParamsEntry" pointed to by "snmpTargetAddrParams".  This
   is accomplished with a choice "params", which is augmented by
   security model specific submodules, currently "ietf-snmp-community"
   (Section 2.7), "ietf-snmp-usm" (Section 2.9), and "ietf-snmp-tls"
   (Section 2.11).

   The YANG model does not define a separate list that maps directly to
   "snmpTargetParamsTable".  Since "snmpProxyTable" also has a reference
   to this table, "snmpProxyTable" also has a choice "params" which is
   augmented by security model specific submodules (Section 2.6).

2.5.  Notification Configuration

   The submodule "ietf-snmp-notification", which defines configuration
   parameters that correspond to the objects in SNMP-NOTIFICATION-MIB,
   has the following structure:

      +--rw snmp
         +--rw notify [name]
         |  +--rw name    snmp:identifier
         |  +--rw tag     snmp:identifier
         |  +--rw type?   enumeration
         +--rw notify-filter-profile [name]
         |  +--rw name       snmp:identifier
         |  +--rw include*   wildcard-object-identifier
         |  +--rw exclude*   wildcard-object-identifier
         +--rw enable-authen-traps?     boolean

   It also augments the "target" list defined in the "ietf-snmp-target"
   submodule (Section 2.4) with one leaf:

     +--rw snmp
         +--rw target [name]
            ...
            +--rw notify-filter-profile?   leafref

   An entry in the list "/snmp/notify" corresponds to an
   "snmpNotifyEntry".




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   An entry in the list "/snmp/notify-filter-profile" corresponds to an
   "snmpNotifyFilterProfileEntry".  In the MIB, there is a sparse
   relationship between "snmpTargetParamsTable" and
   "snmpNotifyFilterProfileTable".  In the YANG model, this sparse
   relationship is represented with a leafref leaf
   "notify-filter-profile" in the "/snmp/target" list, which refers to
   an entry in the "/snmp/notify-filter-profile" list.

   The "snmpNotifyFilterTable" is represented as a list "filter" within
   the "/snmp/notify-filter-profile" list.

2.6.  Proxy Configuration

   The submodule "ietf-snmp-proxy", which defines configuration
   parameters that correspond to the objects in SNMP-PROXY-MIB, has the
   following structure:

      +--rw snmp
         +--rw proxy [name]
            +--rw name                    snmp:identifier
            +--rw type                    enumeration
            +--rw context-engine-id       snmp:engine-id
            +--rw context-name?           snmp:context-name
            +--rw params-in
            |  +--rw (params)
            +--rw single-target-out?      snmp:identifier
            +--rw multiple-target-out?    snmp:identifier

   An entry in the list "/snmp/proxy" corresponds to an
   "snmpProxyEntry".

   Like the "target" list (Section 2.4), the "proxy" list inlines the
   "snmpTargetParamsEntry" pointed to by "snmpProxyTargetParamsIn".
   This is accomplished with a choice "params", which is augmented by
   security model specific submodules, currently "ietf-snmp-community"
   (Section 2.7), "ietf-snmp-usm" (Section 2.9), and "ietf-snmp-tls"
   (Section 2.11).

2.7.  Community Configuration

   The submodule "ietf-snmp-community", which defines configuration
   parameters that correspond to the objects in SNMP-COMMUNITY-MIB, has
   the following structure:








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      +--rw snmp
         +--rw community [index]
            +--rw index            snmp:identifier
            +--rw (name)?
            |  +--:(text-name)
            |  |  +--rw text-name?       string
            |  +--:(binary-name)
            |     +--rw binary-name?     binary
            +--rw security-name    snmp:security-name
            +--rw engine-id?       snmp:engine-id
            +--rw context?         snmp:context-name
            +--rw target-tag?      snmp:identifier

   It also augments the "/snmp/target/params" and "/snmp/proxy/
   params-in/params" choices with nodes for the Community-Based Security
   Model used by SNMPv1 and SNMPv2c:

      +--rw snmp
         +--rw target [name]
         |  ...
         |  +--rw (params)?
         |  |  +--:(v1)
         |  |  |  +--rw v1
         |  |  |     +--rw security-name    snmp:security-name
         |  |  +--:(v2c)
         |  |     +--rw v2c
         |  |        +--rw security-name    snmp:security-name
         |  +--rw mms?       union
         +--rw proxy
            +--rw params-in
               +--rw params
                  +--:(v1)
                  |  +--rw v1
                 |     +--rw security-name    snmp:security-name
                  +--:(v2c)
                     +--rw v2c
                        +--rw security-name    snmp:security-name

   An entry in the list "/snmp/community" corresponds to an
   "snmpCommunityEntry".

   When a case "v1" or "v2c" is chosen, it implies a
   snmpTargetParamsMPModel 0 (SNMPv1) or 1 (SNMPv2), and a
   snmpTargetParamsSecurityModel 1 (SNMPv1) or 2 (SNMPv2), respectively.
   Both cases implies a snmpTargetParamsSecurityLevel of noAuthNoPriv.






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2.8.  View-based Access Control Model Configuration

   The submodule "ietf-snmp-vacm", which defines configuration
   parameters that correspond to the objects in SNMP-VIEW-BASED-ACM-MIB,
   has the following structure:

      +--rw snmp
         +--rw vacm
            +--rw group [name]
            |  +--rw name      group-name
            |  +--rw member [security-name]
            |  |  +--rw security-name     snmp:security-name
            |  |  +--rw security-model*   snmp:security-model
            |  +--rw access [context security-model security-level]
            |     +--rw context           snmp:context-name
            |     +--rw context-match?    enumeration
            |     +--rw security-model    snmp:security-model-or-any
            |     +--rw security-level    snmp:security-level
            |     +--rw read-view?        view-name
            |     +--rw write-view?       view-name
            |     +--rw notify-view?      vire-name
            +--rw view [name]
               +--rw name       view-name
               +--rw include*   snmp:wildcard-object-identifier
               +--rw exclude*   snmp:wildcard-object-identifier

   The "vacmSecurityToGroupTable" and "vacmAccessTable" are mapped to a
   structure of nested lists in the YANG model.  Groups are defined in
   the list "/snmp/vacm/group" and for each group there is a sublist
   "member" that maps to "vacmSecurityToGroupTable", and a sublist
   "access" that maps to "vacmAccessTable".

   MIB views are defined in the list "/snmp/vacm/view" and for each MIB
   view there is a leaf-list of included subtree families and a leaf-
   list of excluded subtree families.  This is more compact and thus a
   more readable representation of the "vacmViewTreeFamilyTable".

2.9.  User-based Security Model Configuration

   The submodule "ietf-snmp-usm", which defines configuration parameters
   that correspond to the objects in SNMP-USER-BASED-SM-MIB, has the
   following structure:









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      +--rw snmp
         +--rw usm
            +--rw local
            |  +--rw user [name]
            |     +-- {common user params}
            +--rw remote [engine-id]
               +--rw engine-id    snmp:engine-id
               +--rw user [name]
                  +-- {common user params}

   The "{common user params}" are:

      +--rw name    snmp:identifier
      +--rw auth?
      |  +--rw (protocol)
      |     +--:(md5)
      |     |  +--rw md5
      |     |     +-- rw key    string
      |     +--:(sha)
      |        +--rw sha
      |           +-- rw key    string
      +--rw priv?
         +--rw (protocol)
            +--:(des)
            |  +--rw des
            |     +-- rw key    string
            +--:(aes)
               +--rw aes
                  +-- rw key    string

   It also augments the "/snmp/target/params" and "/snmp/proxy/
   params-in/params" choices with nodes for the SNMP User-based Security
   Model.


















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     +--rw snmp
         +--rw target [name]
            ...
         |  +--rw (params)?
         |     +--:(usm)
         |        +--rw usm
         |           +--rw user-name         snmp:security-name
         |           +--rw security-level    security-level
         +--rw proxy [name]
            ...
            +--rw params-in
               +--rw (params)
                  +--:(usm)
                     +--rw usm
                        +--rw user-name         snmp:security-name
                        +--rw security-level    security-level

   In the MIB, there is a single table with local and remote users,
   indexed by the engine id and user name.  In the YANG model, there is
   one list of local users, and a nested list of remote users.

   In the MIB, there are several objects related to changing the
   authentication and privacy keys.  These objects are not present in
   the YANG model.  However, the localized key can be changed.  This
   implies that if the engine id is changed, all users keys need to be
   changed as well.

2.10.  Transport Security Model Configuration

   The submodule "ietf-snmp-tsm", which defines configuration parameters
   that correspond to the objects in SNMP-TSM-MIB, has the following
   structure:

     +--rw snmp
        +--rw tsm
           +--rw use-prefix?   boolean

   It also augments the "/snmp/target/params" and "/snmp/proxy/
   params-in/params" choices with nodes for the SNMP Transport Security
   Model.











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     +--rw snmp
        +--rw target [name]
           ...
        |  +--rw (params)?
        |     +--:(tsm)
        |        +--rw tsm
        |           +--rw security-name     snmp:security-name
        |           +--rw security-level    security-level
        +--rw proxy [name]
           ...
           +--rw params-in
              +--rw (params)
                 +--:(tsm)
                    +--rw tsm
                       +--rw security-name     snmp:security-name
                       +--rw security-level    security-level

2.11.  Transport Layer Security Transport Model Configuration

   The submodule "ietf-snmp-tls", which defines configuration parameters
   that correspond to the objects in SNMP-TLS-TM-MIB, has the following
   structure:

     +--rw snmp
        ...
        +--rw target [name]
        |  ...
        |  +--rw (transport)
        |     ...
        |     +--:(tls)
        |     |  +--rw tls
        |     |     +-- {common (d)tls transport params}
        |     +--:(dtls)
        |        +--rw dtls
        |           +-- {common (d)tls transport params}
        +--rw tlstm
           +--rw cert-to-tm-security-name [id]
              +--rw id                                 uint32
              +--rw fingerprint?                       tls-fingerprint
              +--rw map-type?                          identityref
              +--rw cert-specified-tm-security-name?   admin-string

   The "{common (d)tls transport params}" are:

     +--rw ip?                   inet:ip-address
     +--rw port?                 inet:port-number
     +--rw client-fingerprint?   tls-fingerprint
     +--rw server-fingerprint?   tls-fingerprint



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     +--rw server-identity?      admin-string

   It also augments the "/snmp/engine/listen" container with objects for
   the D(TLS) transport endpoints:

     +--rw snmp
        +--rw engine
           ...
           +--rw listen
             ...
             +--rw tls [ip port]
             |  +--rw ip      inet:ip-address
             |  +--rw port    inet:port-number
             +--rw dtls [ip port]
                 +--rw ip      inet:ip-address
                 +--rw port    inet:port-number

2.12.  Secure Shell Transport Model Configuration

   The submodule "ietf-snmp-ssh", which defines configuration parameters
   that correspond to the objects in SNMP-SSH-TM-MIB, has the following
   structure:

     +--rw snmp
        ...
        +--rw target [name]
          ...
          +--rw (transport)
             ...
             +--:(ssh)
                +--rw ssh
                   +--rw ip          inet:host
                   +--rw port?       inet:port-number
                   +--rw username?   string

   It also augments the "/snmp/engine/listen" container with objects for
   the SSH transport endpoints:

     +--rw snmp
        +--rw engine
           ...
           +--rw listen
             ...
             +--rw ssh [ip port]







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3.  Definitions

3.1.  Module 'ietf-snmp'

   <CODE BEGINS> file "ietf-snmp.yang"

   module ietf-snmp {

     namespace "urn:ietf:params:xml:ns:yang:ietf-snmp";
     prefix snmp;

     include ietf-snmp-common {
       revision-date 2013-02-11;
     }
     include ietf-snmp-engine {
       revision-date 2012-06-05;
     }
     include ietf-snmp-target {
       revision-date 2012-06-05;
     }
     include ietf-snmp-notification {
       revision-date 2012-06-05;
     }
     include ietf-snmp-proxy {
       revision-date 2012-06-05;
     }
     include ietf-snmp-community {
       revision-date 2012-06-05;
     }
     include ietf-snmp-usm {
       revision-date 2013-02-11;
     }
     include ietf-snmp-tsm {
       revision-date 2012-06-05;
     }
     include ietf-snmp-vacm {
       revision-date 2012-06-05;
     }
     include ietf-snmp-tls {
       revision-date 2013-02-11;
     }
     include ietf-snmp-ssh {
       revision-date 2012-11-26;
     }

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";




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     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This module contains a collection of YANG definitions for
        configuring SNMP engines.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-11-26 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

   }




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   <CODE ENDS>

3.2.  Submodule 'ietf-snmp-common'

   <CODE BEGINS> file "ietf-snmp-common.yang"

   submodule ietf-snmp-common {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     import ietf-yang-types {
       prefix yang;
     }

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of common YANG definitions
        for configuring SNMP engines.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).



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        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2013-02-11 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     /* Collection of SNMP features */

     feature proxy {
       description
         "A server implements this feature if it can act as an
         SNMP Proxy";
     }

     feature notification-filter {
       description
         "A server implements this feature if it supports SNMP
         notification filtering.";
     }

     feature tsm {
       description
         "A server implements this feature if it supports the
         Transport Security Model for SNMP.";
       reference
         "RFC5591: Transport Security Model for the
                   Simple Network Management Protocol (SNMP)";
     }

     feature sshtm {
       description
         "A server implements this feature if it supports the
         Secure Shell Transport Model for SNMP.";
       reference
         "RFC5592: Secure Shell Transport Model for the
                   Simple Network Management Protocol (SNMP)";
     }




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     feature tlstm {
       description
         "A server implements this feature if it supports the
         Transport Layer Security Transport Model for SNMP.";
       reference
         "RFC6353: Transport Layer Security (TLS) Transport Model for
                   the Simple Network Management Protocol (SNMP)";
     }

     /* Collection of SNMP specific data types */

     typedef admin-string {
       type string {
         length "0..255";
       }
       description
         "Represents and SnmpAdminString as defined in RFC 3411.

         Note that the size of an SnmpAdminString is measured in
         octets, not characters.";
       reference "SNMP-FRAMEWORK-MIB.SnmpAdminString";
     }

     typedef identifier {
       type admin-string {
         length "1..32";
       }
       description
         "Identifiers are used to name items in the SNMP configuration
         data store.";
     }

     typedef context-name {
       type admin-string {
         length "0..32";
       }
       description
         "The context type represents an SNMP context name.";
       reference
         "RFC3411: An Architecture for Describing SNMP Management
                   Frameworks";
     }

     typedef security-name {
       type admin-string {
         length "1..32";
       }
       description



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         "The security-name type represents an SNMP security name.";
       reference
         "RFC3411: An Architecture for Describing SNMP Management
                   Frameworks";
     }

     typedef security-model {
       type union {
         type enumeration {
           enum v1  { value 1; }
           enum v2c { value 2; }
           enum usm { value 3; }
           enum tsm { value 4; }
         }
         type int32 {
           range "1..2147483647";
         }
       }
       reference
         "RFC3411: An Architecture for Describing SNMP Management
                   Frameworks";
     }

     typedef security-model-or-any {
       type union {
         type enumeration {
           enum any { value 0; }
         }
         type security-model;
       }
       reference
         "RFC3411: An Architecture for Describing SNMP Management
                   Frameworks";
     }

     typedef security-level {
       type enumeration {
         enum no-auth-no-priv { value 1; }
         enum auth-no-priv    { value 2; }
         enum auth-priv       { value 3; }
       }
       reference
         "RFC3411: An Architecture for Describing SNMP Management
                   Frameworks";
     }

     typedef engine-id {
       type yang:hex-string {



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         pattern '([0-9a-fA-F]){2}(:([0-9a-fA-F]){2}){4,31}';
       }
       description
         "The Engine ID specified as a list of colon-specified hexa-
         decimal octets, e.g., '80:00:02:b8:04:61:62:63'.";
       reference
         "RFC3411: An Architecture for Describing SNMP Management
                   Frameworks";
     }

     typedef wildcard-object-identifier {
       type string;
       description
         "The wildcard-object-identifier type represents an SNMP object
         identifier where subidentifiers can be given either as a label,
         in numeric form, or a wildcard, represented by a *.";
     }

     container snmp {
       description
         "Top-level container for SNMP related configuration and
         status objects.";
     }

   }

   <CODE ENDS>

3.3.  Submodule 'ietf-snmp-engine'

   <CODE BEGINS> file "ietf-snmp-engine.yang"

   submodule ietf-snmp-engine {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     import ietf-inet-types {
       prefix inet;
     }

     include ietf-snmp-common;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact



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       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions
        for configuring SNMP engines.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-06-05 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     augment /snmp:snmp {

       container engine {



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         description
           "Configuration of the SNMP engine.";

         leaf enabled {
           type boolean;
           default "false";
           description
             "Enables the SNMP engine.";
         }

         container listen {
           description
             "Configuration of the transport endpoints on which the
              engine listens. Submodules providing configuration for
              additional transports are expected to augment this
              container.";

           list udp {
             key "ip port";
             description
               "A list of IPv4 and IPv6 addresses and ports to which the
                engine listens.";

             leaf ip {
               type inet:ip-address;
               description
                 "The IPv4 or IPv6 address on which the engine
                  listens.";
             }
             leaf port {
               type inet:port-number;
               description
                 "The UDP port on which the engine listens.";
             }
           }
         }

         container version {
           description
             "SNMP version used by the engine";
           leaf v1 {
             type empty;
           }
           leaf v2c {
             type empty;
           }
           leaf v3 {
             type empty;



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           }
         }

         leaf engine-id {
           type snmp:engine-id;
           description
             "The local SNMP engine's administratively-assigned unique
              identifier.

              If this leaf is not set, the device automatically
              calculates an engine id, as described in RFC 3411.  A
              server MAY initialize this leaf with the automatically
              created value.";
           reference "SNMP-FRAMEWORK-MIB.snmpEngineID";
         }
       }
     }
   }

   <CODE ENDS>

3.4.  Submodule 'ietf-snmp-target'

   <CODE BEGINS> file "ietf-snmp-target.yang"

   submodule ietf-snmp-target {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     import ietf-inet-types {
       prefix inet;
     }

     include ietf-snmp-common;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder



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                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions
        for configuring SNMP targets.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC3413: Simple Network Management Protocol (SNMP)
                 Applications";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-06-05 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     augment /snmp:snmp {

       list target {
         key name;
         description
           "List of targets.";



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         reference "SNMP-TARGET-MIB.snmpTargetAddrTable";

         leaf name {
           type snmp:identifier;
           description
             "Identifies the target.";
           reference "SNMP-TARGET-MIB.snmpTargetAddrName";
         }
         choice transport {
           mandatory true;
           description
             "Transport address of the target.

              The snmpTargetAddrTDomain and snmpTargetAddrTAddress
              objects are mapped to transport-specific YANG nodes.  Each
              transport is configured as a separate case in this
              choice. Submodules providing configuration for additional
              transports are expected to augment this choice.";
           reference "SNMP-TARGET-MIB.snmpTargetAddrTDomain
                      SNMP-TARGET-MIB.snmpTargetAddrTAddress";
           case udp {
             reference "SNMPv2-TM.snmpUDPDomain
                        TRANSPORT-ADDRESS-MIB.transportDomainUdpIpv4
                        TRANSPORT-ADDRESS-MIB.transportDomainUdpIpv4z
                        TRANSPORT-ADDRESS-MIB.transportDomainUdpIpv6
                        TRANSPORT-ADDRESS-MIB.transportDomainUdpIpv6z";
             container udp {
               leaf ip {
                 type inet:ip-address;
                 mandatory true;
                 reference "SNMP-TARGET-MIB.snmpTargetAddrTAddress";
               }
               leaf port {
                 type inet:port-number;
                 default 162;
                 description
                   "UDP port number";
                 reference "SNMP-TARGET-MIB.snmpTargetAddrTAddress";
               }
               leaf prefix-length {
                 type uint8;
                 description
                   "The value of this leaf must match the value of
                    ../snmp:ip. If ../snmp:ip contains an ipv4 address,
                    this leaf must be less than or equal to 32.  If it
                    contains an ipv6 address, it must be less than or
                    equal to 128.




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                    Note that the prefix-length is currently only used
                    by the Community-based Security Model to filter
                    incoming messages. Furthermore, the prefix-length
                    filtering does not cover all possible filters
                    supported by the corresponding MIB object.";
                 reference "SNMP-COMMUNITY-MIB.snmpTargetAddrTMask";
               }
             }
           }
         }
         leaf-list tag {
           type snmp:identifier;
           description
             "List of tag values used to select target address.";
           reference "SNMP-TARGET-MIB.snmpTargetAddrTagList";
         }
         leaf timeout {
           type uint32;
           units "0.01 seconds";
           default 1500;
           description
             "Needed only if this target can receive
              InformRequest-PDUs.";
           reference "SNMP-TARGET-MIB.snmpTargetAddrTimeout";
         }
         leaf retries {
           type uint8;
           default 3;
           description
             "Needed only if this target can receive
              InformRequest-PDUs.";
           reference "SNMP-TARGET-MIB.snmpTargetAddrRetryCount";
         }
         choice params {
           description
             "This choice is augmented with case nodes containing
              security model specific configuration parameters.  Each
              such case represents one entry in the
              snmpTargetParamsTable.

              When the snmpTargetAddrParams object contains a reference
              to a non-existing snmpTargetParamsEntry, this choice does
              not contain any case, and vice versa.";
           reference "SNMP-TARGET-MIB.snmpTargetAddrParams
                      SNMP-TARGET-MIB.snmpTargetParamsTable";
         }
       }
     }



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   }

   <CODE ENDS>

3.5.  Submodule 'ietf-snmp-notification'

   <CODE BEGINS> file "ietf-snmp-notification.yang"

   submodule ietf-snmp-notification {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     include ietf-snmp-common;
     include ietf-snmp-target;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions
        for configuring SNMP notifications.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents



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        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC3413: Simple Network Management Protocol (SNMP)
                 Applications";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-06-05 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     augment /snmp:snmp {

       list notify {
         key name;
         description
           "Targets that will receive notifications.

            Entries in this lists are mapped 1-1 to entries in
            snmpNotifyTable, except that if an entry in snmpNotifyTable
            has a snmpNotifyTag for which no snmpTargetAddrEntry exists,
            then the snmpNotifyTable entry is not mapped to an entry in
            this list.";
         reference "SNMP-NOTIFICATION-MIB.snmpNotifyTable";

         leaf name {
           type snmp:identifier;
           description
             "An arbitrary name for the list entry.";
           reference "SNMP-NOTIFICATION-MIB.snmpNotifyName";
         }
         leaf tag {
           type snmp:identifier;
           mandatory true;
           description
             "Target tag, selects a set of notification targets.




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              Implementations MAY restrict the values of this leaf
              to be one of the available values of /snmp/target/tag in
              a valid configuration.";
           reference "SNMP-NOTIFICATION-MIB.snmpNotifyTag";
         }
         leaf type {
           type enumeration {
             enum trap { value 1; }
             enum inform { value 2; }
           }
           default trap;
           description
             "Defines the notification type to be generated.";
           reference "SNMP-NOTIFICATION-MIB.snmpNotifyType";
         }
       }

       list notify-filter-profile {
         if-feature snmp:notification-filter;
         key name;

         description
           "Notification filter profiles.

            The leaf /snmp/target/notify-filter-profile is used
            to associate a filter profile with a target.

            If an entry in this list is referred to by one or more
            /snmp/target/notify-filter-profile, each such
            notify-filter-profile is represented by one
            snmpNotifyFilterProfileEntry.

            If an entry in this list is not referred to by any
            /snmp/target/notify-filter-profile, the entry is not mapped
            to snmpNotifyFilterProfileTable.";
         reference "SNMP-NOTIFICATION-MIB.snmpNotifyFilterProfileTable
                    SNMP-NOTIFICATION-MIB.snmpNotifyFilterTable";

         leaf name {
           type snmp:identifier;
           description
             "Name of the filter profile";
           reference
             "SNMP-NOTIFICATION-MIB.snmpNotifyFilterProfileName";
         }

         leaf-list include {
           type snmp:wildcard-object-identifier;



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           description
             "A family of subtrees included in this filter.";
           reference "SNMP-NOTIFICATION-MIB.snmpNotifyFilterSubtree
                      SNMP-NOTIFICATION-MIB.snmpNotifyFilterMask
                      SNMP-NOTIFICATION-MIB.snmpNotifyFilterType";
         }

         leaf-list exclude {
           type snmp:wildcard-object-identifier;
           description
             "A family of subtrees excluded from this filter.";
           reference "SNMP-NOTIFICATION-MIB.snmpNotifyFilterSubtree
                      SNMP-NOTIFICATION-MIB.snmpNotifyFilterMask
                      SNMP-NOTIFICATION-MIB.snmpNotifyFilterType";
         }
       }

       leaf enable-authen-traps {
         type boolean;
         description
           "Indicates whether the SNMP entity is permitted to
            generate authenticationFailure traps.";
         reference "SNMPv2-MIB.snmpEnableAuthenTraps";
       }
     }

     augment /snmp:snmp/snmp:target {
       reference "SNMP-NOTIFICATION-MIB.snmpNotifyFilterProfileTable";
       leaf notify-filter-profile {
         if-feature snmp:notification-filter;
         type leafref {
           path "/snmp/notify-filter-profile/name";
         }
         description
           "This leafref leaf is used to represent the sparse
            relationship between the /snmp/target list and the
            /snmp/notify-filter-profile list.";
         reference "SNMP-NOTIFICATION-MIB.snmpNotifyFilterProfileName";
       }
     }

   }

   <CODE ENDS>







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3.6.  Submodule 'ietf-snmp-proxy'

   <CODE BEGINS> file "ietf-snmp-proxy.yang"

   submodule ietf-snmp-proxy {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     include ietf-snmp-common;
     include ietf-snmp-target;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions
        for configuring SNMP proxies.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";



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     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC3413: Simple Network Management Protocol (SNMP)
                 Applications";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-06-05 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     augment /snmp:snmp {
       if-feature snmp:proxy;

       list proxy {
         key name;

         description
           "List of proxy parameters.";
         reference "SNMP-PROXY-MIB.snmpProxyTable";

         leaf name {
           type snmp:identifier;
           description
             "Identifies the proxy parameter entry.";
           reference "SNMP-PROXY-MIB.snmpProxyName";
         }
         leaf type {
           type enumeration {
             enum read;
             enum write;
             enum trap;
             enum inform;
           }
           mandatory true;
           reference "SNMP-PROXY-MIB.snmpProxyType";
         }
         leaf context-engine-id {
           type snmp:engine-id;
           mandatory true;
           reference "SNMP-PROXY-MIB.snmpProxyContextEngineID";
         }



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         leaf context-name {
           type snmp:context-name;
           reference "SNMP-PROXY-MIB.snmpProxyContextName";
         }
         container params-in {
           choice params {
             mandatory true;
             description
               "This choice is augmented with case nodes containing
                security model specific configuration parameters.  Each
                such case represents one entry in the
                snmpTargetParamsTable.

                When the snmpProxyTargetParamsIn object contains a
                reference to a non-existing snmpTargetParamsEntry, this
                choice does not contain any case, and vice versa.";
           }
           reference "SNMP-PROXY-MIB.snmpProxyTargetParamsIn";
         }
         leaf single-target-out {
           when "../type = 'read' or ../type = 'write'";
           type snmp:identifier;
           description
             "Implementations MAY restrict the values of this leaf
              to be one of the available values of /snmp/target/name in
              a valid configuration.";
           reference "SNMP-PROXY-MIB.snmpProxySingleTargetOut";
         }
         leaf multiple-target-out {
           when "../type = 'trap' or ../type = 'inform'";
           type snmp:identifier;
           description
             "Implementations MAY restrict the values of this leaf
              to be one of the available values of /snmp/target/tag in
              a valid configuration.";
           reference "SNMP-PROXY-MIB.snmpProxyMultipleTargetOut";
         }
       }
     }
   }

   <CODE ENDS>

3.7.  Submodule 'ietf-snmp-community'

   <CODE BEGINS> file "ietf-snmp-community.yang"

   submodule ietf-snmp-community {



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     belongs-to ietf-snmp {
       prefix snmp;
     }

     include ietf-snmp-common;
     include ietf-snmp-target;
     include ietf-snmp-proxy;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions
        for configuring community-based SNMP.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference



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       "RFC3584: Coexistence between Version 1, Version 2, and Version 3
                 of the Internet-standard Network Management Framework";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-06-05 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     augment /snmp:snmp {

       list community {
         key index;

         description
           "List of communities";
         reference "SNMP-COMMUNITY-MIB.snmpCommunityTable";

         leaf index {
           type snmp:identifier;
           description
             "Index into the community list.";
           reference "SNMP-COMMUNITY-MIB.snmpCommunityIndex";
         }
         choice name {
           description
             "The community name, either specified as a string
              or as a binary.  The binary name is used when the
              community name contains characters that are not legal
              in a string.

              If not set, the value of 'security-name' is operationally
              used as the snmpCommunityName.";
           reference "SNMP-COMMUNITY-MIB.snmpCommunityName";
           leaf text-name {
             type string;
             description
               "A community name that can be represented as a
                YANG string.";
           }
           leaf binary-name {
             type binary;
             description
               "A community name represented as a binary value.";



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           }
         }
         leaf security-name {
           type snmp:security-name;
           mandatory true;
           description
             "The snmpCommunitySecurityName of this entry.";
           reference "SNMP-COMMUNITY-MIB.snmpCommunitySecurityName";
         }
         leaf engine-id {
           if-feature snmp:proxy;
           type snmp:engine-id;
           description
             "If not set, the value of the local SNMP engine is
              operationally used by the device.";
           reference "SNMP-COMMUNITY-MIB.snmpCommunityContextEngineID";
         }
         leaf context {
           type snmp:context-name;
           default "";
           description
             "The context in which management information is accessed
              when using the community string specified by this entry.";
           reference "SNMP-COMMUNITY-MIB.snmpCommunityContextName";
         }
         leaf target-tag {
           type snmp:identifier;
           description
             "Used to limit access for this community to the specified
              targets.

              Implementations MAY restrict the values of this leaf
              to be one of the available values of /snmp/target/tag in
              a valid configuration.";
           reference "SNMP-COMMUNITY-MIB.snmpCommunityTransportTag";
         }
       }
     }

     grouping v1-target-params {
       container v1 {
         description
           "SNMPv1 parameters type.
            Represents snmpTargetParamsMPModel '0',
            snmpTargetParamsSecurityModel '1', and
            snmpTargetParamsSecurityLevel 'noAuthNoPriv'.";
         leaf security-name {
           type snmp:security-name;



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           mandatory true;
           description
             "Implementations MAY restrict the values of this leaf
              to be one of the available values of
              /snmp/community/security-name in a valid configuration.";
           reference "SNMP-TARGET-MIB.snmpTargetParamsSecurityName";
         }
       }
     }

     grouping v2c-target-params {
       container v2c {
         description
           "SNMPv2 community parameters type.
            Represents snmpTargetParamsMPModel '1',
            snmpTargetParamsSecurityModel '2', and
            snmpTargetParamsSecurityLevel 'noAuthNoPriv'.";
         leaf security-name {
           type snmp:security-name;
           mandatory true;
           description
             "Implementations MAY restrict the values of this leaf
              to be one of the available values of
              /snmp/community/security-name in a valid configuration.";
           reference "SNMP-TARGET-MIB.snmpTargetParamsSecurityName";
         }
       }
     }

     augment /snmp:snmp/snmp:target/snmp:params {
       case v1 {
         uses v1-target-params;
       }
       case v2c {
         uses v2c-target-params;
       }
     }

     augment /snmp:snmp/snmp:proxy/snmp:params-in/snmp:params {
       case v1 {
         uses v1-target-params;
       }
       case v2c {
         uses v2c-target-params;
       }
     }

     augment /snmp:snmp/snmp:target {



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       when "snmp:v1 or snmp:v2c";
       leaf mms {
         type union {
           type enumeration {
             enum "unknown";
           }
           type int32 {
             range "484..max";
           }
         }
         default "484";
         reference
           "SNMP-COMMUNITY-MIB.snmpTargetAddrMMS";
       }
     }

   }

   <CODE ENDS>

3.8.  Submodule 'ietf-snmp-vacm'

   <CODE BEGINS> file "ietf-snmp-vacm.yang"

   submodule ietf-snmp-vacm {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     include ietf-snmp-common;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>




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        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions
        for configuring the View-based Access Control Model (VACM)
        of SNMP.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC3415: View-based Access Control Model (VACM) for the
                 Simple Network Management Protocol (SNMP)";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-06-05 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     typedef view-name {
       type snmp:identifier;
       description
         "The view-name type represents an SNMP VACM view name.";
     }

     typedef group-name {
       type snmp:identifier;
       description
         "The group-name type represents an SNMP VACM group name.";



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     }

     augment /snmp:snmp {

       container vacm {
         description
           "Configuration of the View-based Access Control Model";

         list group {
           key name;
           description
             "VACM Groups.

              This data model has a different structure than the MIB.
              Groups are explicitly defined in this list, and group
              members are defined in the 'member' list (mapped to
              vacmSecurityToGroupTable), and access for the group is
              defined in the 'access' list (mapped to
              vacmAccessTable).";
           reference "SNMP-VIEW-BASED-ACM-MIB.vacmSecurityToGroupTable
                      SNMP-VIEW-BASED-ACM-MIB.vacmAccessTable";

           leaf name {
             type group-name;
             description
               "The name of this VACM group.";
             reference "SNMP-VIEW-BASED-ACM-MIB.vacmGroupName";
           }

           list member {
             key "security-name";
             min-elements 1;
             description
               "A member of this VACM group. According to VACM, every
                group must have at least one member.

                A certain combination of security-name and
                security-model MUST NOT be present in more than
                one group.";
             reference
               "SNMP-VIEW-BASED-ACM-MIB.vacmSecurityToGroupTable";

             leaf security-name {
               type snmp:security-name;
               description
                 "The securityName of a group member.";
               reference "SNMP-VIEW-BASED-ACM-MIB.vacmSecurityName";
             }



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             leaf-list security-model {
               type snmp:security-model;
               min-elements 1;
               description
                 "The security models under which this security-name
                  is a member of this group.";
               reference "SNMP-VIEW-BASED-ACM-MIB.vacmSecurityModel";
             }
           }

           list access {
             key "context security-model security-level";
             description
               "Definition of access right for groups";
             reference "SNMP-VIEW-BASED-ACM-MIB.vacmAccessTable";

             leaf context {
               type snmp:context-name;
               description
                 "The context (prefix) under which the access rights
                  apply.";
               reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmAccessContextPrefix";
             }

             leaf context-match {
               type enumeration {
                 enum exact;
                 enum prefix;
               }
               default exact;
               reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmAccessContextMatch";
             }

             leaf security-model {
               type snmp:security-model-or-any;
               description
                 "The security model under which the access rights
                 apply.";
               reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmAccessSecurityModel";
             }

             leaf security-level {
               type snmp:security-level;
               description
                 "The minimum security level under which the access



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                  rights apply.";
               reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmAccessSecurityLevel";
             }

             leaf read-view {
               type view-name;
               description
                 "The name of the MIB view of the SNMP context
                  authorizing read access. If this leaf does not
                  exist in a configuration, it maps to a zero-length
                  vacmAccessReadViewName.

                  Implementations MAY restrict the values of this
                  leaf to be one of the available values of
                  /snmp/vacm/view/name in a valid configuration.";
               reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmAccessReadViewName";
             }

             leaf write-view {
               type view-name;
               description
                 "The name of the MIB view of the SNMP context
                  authorizing write access. If this leaf does not
                  exist in a configuration, it maps to a zero-length
                  vacmAccessWriteViewName.

                  Implementations MAY restrict the values of this
                  leaf to be one of the available values of
                  /snmp/vacm/view/name in a valid configuration.";
               reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmAccessWriteViewName";
             }

             leaf notify-view {
               type view-name;
               description
                 "The name of the MIB view of the SNMP context
                  authorizing notify access. If this leaf does not
                  exist in a configuration, it maps to a zero-length
                  vacmAccessNotifyViewName.

                  Implementations MAY restrict the values of this
                  leaf to be one of the available values of
                  /snmp/vacm/view/name in a valid configuration.";
               reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmAccessNotifyViewName";



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             }
           }
         }

         list view {
           key name;
           description
             "Definition of MIB views.";
           reference
             "SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilyTable";

           leaf name {
             type view-name;
             description
               "The name of this VACM MIB view.";
             reference
               "SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilyName";
           }

           leaf-list include {
             type snmp:wildcard-object-identifier;
             description
               "A family of subtrees included in this MIB view.";
             reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilySubtree
                  SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilyMask
                  SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilyType";
           }

           leaf-list exclude {
             type snmp:wildcard-object-identifier;
             description
               "A family of subtrees excluded from this MIB view.";
             reference
                 "SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilySubtree
                  SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilyMask
                  SNMP-VIEW-BASED-ACM-MIB.vacmViewTreeFamilyType";
           }
         }
       }
     }
   }

   <CODE ENDS>







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3.9.  Submodule 'ietf-snmp-usm'

   <CODE BEGINS> file "ietf-snmp-usm.yang"

   submodule ietf-snmp-usm {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     import ietf-yang-types {
       prefix yang;
     }
     import ietf-netconf-acm {
       prefix nacm;
     }

     include ietf-snmp-common;
     include ietf-snmp-target;
     include ietf-snmp-proxy;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions for
        configuring the User-based Security Model (USM) of SNMP.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or



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        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC3414: User-based Security Model (USM) for version 3 of the
                 Simple Network Management Protocol (SNMPv3).";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2013-02-11 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     grouping key {
       leaf key {
         type yang:hex-string;
         mandatory true;
         nacm:default-deny-all;
         description
           "Localized key specified as a list of colon-specified
            hexa-decimal octets";
       }
     }

     grouping user-list {
       list user {
         key "name";

         reference "SNMP-USER-BASED-SM-MIB.usmUserTable";

         leaf name {
           type snmp:identifier;
           reference "SNMP-USER-BASED-SM-MIB.usmUserName";
         }
         container auth {



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           presence "enables authentication";
           description
             "Enables authentication of the user";
           choice protocol {
             mandatory true;
             reference "SNMP-USER-BASED-SM-MIB.usmUserAuthProtocol";
             container md5 {
               uses key;
               reference
                 "SNMP-USER-BASED-SM-MIB.usmHMACMD5AuthProtocol";
             }
             container sha {
               uses key;
               reference
                 "SNMP-USER-BASED-SM-MIB.usmHMACSHAAuthProtocol";
             }
           }
         }
         container priv {
           must "../auth" {
             error-message
               "when privacy is used, authentication must also be used";
           }
           presence "enables encryption";
           description
             "Enables encryption of SNMP messages.";

           choice protocol {
             mandatory true;
             reference "SNMP-USER-BASED-SM-MIB.usmUserPrivProtocol";
             container des {
               uses key;
               reference "SNMP-USER-BASED-SM-MIB.usmDESPrivProtocol";
             }
             container aes {
               uses key;
               reference "SNMP-USM-AES-MIB.usmAesCfb128Protocol";
             }
           }
         }
       }
     }

     augment /snmp:snmp {

       container usm {
         description
           "Configuration of the User-based Security Model";



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         container local {
           uses user-list;
         }

         list remote {
           key "engine-id";

           leaf engine-id {
             type snmp:engine-id;
             reference "SNMP-USER-BASED-SM-MIB.usmUserEngineID";
           }

           uses user-list;
         }
       }
     }

     grouping usm-target-params {
       container usm {
         description
           "User based SNMPv3 parameters type.

            Represents snmpTargetParamsMPModel '3' and
            snmpTargetParamsSecurityModel '3'";
         leaf user-name {
           type snmp:security-name;
           mandatory true;
           reference
             "SNMP-TARGET-MIB.snmpTargetParamsSecurityName";
         }
         leaf security-level {
           type snmp:security-level;
           mandatory true;
           reference
             "SNMP-TARGET-MIB.snmpTargetParamsSecurityLevel";
         }
       }
     }

     augment /snmp:snmp/snmp:target/snmp:params {
       case usm {
         uses usm-target-params;
       }
     }

     augment /snmp:snmp/snmp:proxy/snmp:params-in/snmp:params {
       case usm {
         uses usm-target-params;



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       }
     }

   }

   <CODE ENDS>

3.10.  Submodule 'ietf-snmp-tsm'

   <CODE BEGINS> file "ietf-snmp-tsm.yang"

   submodule ietf-snmp-tsm {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     include ietf-snmp-common;
     include ietf-snmp-target;
     include ietf-snmp-proxy;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions for
        configuring the Transport Security Model (TSM) of SNMP.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or



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        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC5591: Transport Security Model for the
                 Simple Network Management Protocol (SNMP)";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-06-05 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     augment /snmp:snmp {
       if-feature tsm;
       container tsm {
         description
           "Configuration of the Transport-based Security Model";

         leaf use-prefix {
           type boolean;
           default false;
           reference
             "SNMP-TSM-MIB.snmpTsmConfigurationUsePrefix";
         }
       }
     }

     grouping tsm-target-params {
       container tsm {
         description
           "Transport based security SNMPv3 parameters type.

            Represents snmpTargetParamsMPModel '3' and
            snmpTargetParamsSecurityModel '4'";



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         leaf security-name {
           type snmp:security-name;
           mandatory true;
           reference
             "SNMP-TARGET-MIB.snmpTargetParamsSecurityName";
         }
         leaf security-level {
           type snmp:security-level;
           mandatory true;
           reference
             "SNMP-TARGET-MIB.snmpTargetParamsSecurityLevel";
         }
       }
     }

     augment /snmp:snmp/snmp:target/snmp:params {
       if-feature tsm;
       case tsm {
         uses tsm-target-params;
       }
     }

     augment /snmp:snmp/snmp:proxy/snmp:params-in/snmp:params {
       if-feature tsm;
       case tsm {
         uses tsm-target-params;
       }
     }
   }

   <CODE ENDS>

3.11.  Submodule 'ietf-snmp-tls'

   <CODE BEGINS> file "ietf-snmp-tls.yang"

   submodule ietf-snmp-tls {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     import ietf-yang-types {
       prefix yang;
     }
     import ietf-inet-types {
       prefix inet;
     }



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     include ietf-snmp-common;
     include ietf-snmp-engine;
     include ietf-snmp-target;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions for
        configuring the Transport Layer Security Transport Model (TLSTM)
        of SNMP.

        Copyright (c) 2011 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC6353: Transport Layer Security (TLS) Transport Model for
                 the Simple Network Management Protocol (SNMP)";




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     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2013-02-11 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     /* Typedefs */

     typedef tls-fingerprint {
       type yang:hex-string {
         pattern '([0-9a-fA-F]){2}(:([0-9a-fA-F]){2}){0,254}';
       }
       description
          "A fingerprint value that can be used to uniquely reference
          other data of potentially arbitrary length.

          An tls-fingerprint value is composed of a 1-octet hashing
          algorithm identifier followed by the fingerprint value.  The
          octet value encoded is taken from the IANA TLS HashAlgorithm
          Registry (RFC 5246).  The remaining octets are filled using
          the results of the hashing algorithm.

          The corresponding TEXTUAL-CONVENTION allows a zero-length
          value to be used for objects that are optional.  In the YANG
          data models, such objects are represented as optional leafs.";
       reference "SNMP-TLS-TM-MIB.SnmpTLSFingerprint";
     }

     /* Identities */

     identity cert-to-tm-security-name {
     }

     identity specified {
       base cert-to-tm-security-name;
       reference "SNMP-TLS-TM-MIB.snmpTlstmCertSpecified";
     }

     identity san-rfc822-name {
       base cert-to-tm-security-name;
       reference "SNMP-TLS-TM-MIB.snmpTlstmCertSANRFC822Name";
     }

     identity san-dns-name {



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       base cert-to-tm-security-name;
       reference "SNMP-TLS-TM-MIB.snmpTlstmCertSANDNSName";
     }

     identity san-ip-address {
       base cert-to-tm-security-name;
       reference "SNMP-TLS-TM-MIB.snmpTlstmCertSANIpAddress";
     }

     identity san-any {
       base cert-to-tm-security-name;
       reference "SNMP-TLS-TM-MIB.snmpTlstmCertSANAny";
     }

     identity common-name {
       base cert-to-tm-security-name;
       reference "SNMP-TLS-TM-MIB.snmpTlstmCertCommonName";
     }

     augment /snmp:snmp/snmp:engine/snmp:listen {
       if-feature tlstm;
       list tls {
         key "ip port";
         description
           "A list of IPv4 and IPv6 addresses and ports to which the
            engine listens for SNMP messages over TLS.";

         leaf ip {
           type inet:ip-address;
           description
             "The IPv4 or IPv6 address on which the engine listens
              for SNMP messages over TLS.";
         }
         leaf port {
           type inet:port-number;
           description
             "The TCP port on which the engine listens for SNMP
              messages over TLS.";
         }
       }
       list dtls {
         key "ip port";
         description
           "A list of IPv4 and IPv6 addresses and ports to which the
            engine listens for SNMP messages over DTLS.";

         leaf ip {
           type inet:ip-address;



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           description
             "The IPv4 or IPv6 address on which the engine listens
              for SNMP messages over DTLS.";
         }
         leaf port {
           type inet:port-number;
           description
             "The UDP port on which the engine listens for SNMP messages
              over DTLS.";
         }
       }
     }

     augment /snmp:snmp {
       if-feature tlstm;
       container tlstm {
         list cert-to-tm-security-name {
           key id;
           reference "SNMP-TLS-TM-MIB.snmpTlstmCertToTSNEntry";

           leaf id {
             type uint32;
             reference "SNMP-TLS-TM-MIB.snmpTlstmCertToTSNID";
           }
           leaf fingerprint {
             type tls-fingerprint;
             reference "SNMP-TLS-TM-MIB.snmpTlstmCertToTSNFingerprint";
           }
           leaf map-type {
             type identityref {
               base cert-to-tm-security-name;
             }
             description
               "Mappings that use the snmpTlstmCertToTSNData column
                need to augment the 'cert-to-tm-security-name' list
                with additional configuration objects corresponding
                to the snmpTlstmCertToTSNData value.  Such objects
                should use the 'when' statement to make them
                conditional based on the 'map-type'.";
             reference "SNMP-TLS-TM-MIB.snmpTlstmCertToTSNMapType";
           }
           leaf cert-specified-tm-security-name {
             when "../map-type = 'snmp:specified'";
             type snmp:admin-string;
             description
               "Maps to snmpTlstmCertToTSNData when 'map-type' is
                'specified'.";
             reference "SNMP-TLS-TM-MIB.snmpTlstmCertToTSNData";



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           }
         }
       }
     }

     grouping tls-transport {
       leaf ip {
         type inet:host;
         mandatory true;
         reference "SNMP-TARGET-MIB.snmpTargetAddrTAddress
                    SNMP-TLS-TM-MIB.SnmpTLSAddress";
       }
       leaf port {
         type inet:port-number;
         default 10161;
         reference "SNMP-TARGET-MIB.snmpTargetAddrTAddress
                    SNMP-TLS-TM-MIB.SnmpTLSAddress";
       }
       leaf client-fingerprint {
         type tls-fingerprint;
         reference "SNMP-TLS-TM-MIB.snmpTlstmParamsClientFingerprint";
       }
       leaf server-fingerprint {
         type tls-fingerprint;
         reference "SNMP-TLS-TM-MIB.snmpTlstmAddrServerFingerprint";
       }
       leaf server-identity {
         type snmp:admin-string;
         reference "SNMP-TLS-TM-MIB.snmpTlstmAddrServerIdentity";
       }
     }

     augment /snmp:snmp/snmp:target/snmp:transport {
       if-feature tlstm;
       case tls {
         reference "SNMP-TLS-TM-MIB.snmpTLSTCPDomain";
         container tls {
           uses tls-transport;
         }
       }
     }

     augment /snmp:snmp/snmp:target/snmp:transport {
       if-feature tlstm;
       case dtls {
         reference "SNMP-TLS-TM-MIB.snmpDTLSUDPDomain";
         container dtls {
           uses tls-transport;



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         }
       }
     }
   }

   <CODE ENDS>

3.12.  Submodule 'ietf-snmp-ssh'

   <CODE BEGINS> file "ietf-snmp-ssh.yang"

   submodule ietf-snmp-ssh {

     belongs-to ietf-snmp {
       prefix snmp;
     }

     import ietf-inet-types {
       prefix inet;
     }

     include ietf-snmp-common;
     include ietf-snmp-engine;
     include ietf-snmp-target;

     organization
       "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        WG Chair: David Kessens
                  <mailto:david.kessens@nsn.com>

        WG Chair: Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>

        Editor:   Juergen Schoenwaelder
                  <mailto:j.schoenwaelder@jacobs-university.de>";

     description
       "This submodule contains a collection of YANG definitions for
        configuring the Secure Shell Transport Model (SSHTM)
        of SNMP.



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        Copyright (c) 2012 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (http://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC XXXX; see
        the RFC itself for full legal notices.";

     // RFC Ed.: replace XXXX with actual RFC number and remove this
     // note.

     reference
       "RFC5592: Secure Shell Transport Model for the
                 Simple Network Management Protocol (SNMP)";

     // RFC Ed.: update the date below with the date of RFC publication
     // and remove this note.

     revision 2012-11-26 {
       description
         "Initial revision.";
       reference
         "RFC XXXX: A YANG Data Model for SNMP Configuration";
     }

     augment /snmp:snmp/snmp:engine/snmp:listen {
       if-feature sshtm;
       list ssh {
         key "ip port";
         description
           "A list of IPv4 and IPv6 addresses and ports to which the
            engine listens for SNMP messages over SSH.";

         leaf ip {
           type inet:ip-address;
           description
             "The IPv4 or IPv6 address on which the engine listens
              for SNMP messages over SSH.";
         }
         leaf port {
           type inet:port-number;
           description
             "The TCP port on which the engine listens for SNMP



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              messages over SSH.";
         }
       }
     }

     augment /snmp:snmp/snmp:target/snmp:transport {
       if-feature sshtm;
       case ssh {
         reference "SNMP-SSH-TM-MIB.snmpSSHDomain";
         container ssh {
           leaf ip {
             type inet:host;
             mandatory true;
             reference "SNMP-TARGET-MIB.snmpTargetAddrTAddress
                        SNMP-SSH-TM-MIB.SnmpSSHAddress";
           }
           leaf port {
             type inet:port-number;
             default 5161;
             reference "SNMP-TARGET-MIB.snmpTargetAddrTAddress
                        SNMP-SSH-TM-MIB.SnmpSSHAddress";
           }
           leaf username {
             type string;
             reference "SNMP-TARGET-MIB.snmpTargetAddrTAddress
                        SNMP-SSH-TM-MIB.SnmpSSHAddress";
           }
         }
       }
     }
   }


   <CODE ENDS>

















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4.  IANA Considerations

   This document registers a URI in the IETF XML registry [RFC3688].
   Following the format in RFC 3688, the following registration is
   requested to be made.

        URI: urn:ietf:params:xml:ns:yang:ietf-snmp

        Registrant Contact: The NETMOD WG of the IETF.

        XML: N/A, the requested URI is an XML namespace.

   This document registers a YANG module in the YANG Module Names
   registry [RFC6020].

        name:         ietf-snmp
        namespace:    urn:ietf:params:xml:ns:yang:ietf-snmp
        prefix:       snmp
        reference:    RFC XXXX

   The document registers the following YANG submodules in the YANG
   Module Names registry [RFC6020].





























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        name:         ietf-snmp-common
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-engine
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-community
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-notification
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-target
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-vacm
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-usm
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-tsm
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-tls
        parent:       ietf-snmp
        reference:    RFC XXXX

        name:         ietf-snmp-ssh
        parent:       ietf-snmp
        reference:    RFC XXXX












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5.  Security Considerations

   The YANG module and submodules defined in this memo are designed to
   be accessed via the NETCONF protocol [RFC6241].  The lowest NETCONF
   layer is the secure transport layer and the mandatory-to-implement
   secure transport is SSH [RFC6242].

   There are a number of data nodes defined in the YANG module and
   submodules which are writable/creatable/deletable (i.e., config true,
   which is the default).  These data nodes may be considered sensitive
   or vulnerable in some network environments.  Write operations (e.g.,
   edit-config) to these data nodes without proper protection can have a
   negative effect on network operations.  These are the subtrees and
   data nodes and their sensitivity/vulnerability:

     <list subtrees and data nodes and state why they are sensitive>

   Some of the readable data nodes in the YANG module and submodules may
   be considered sensitive or vulnerable in some network environments.
   It is thus important to control read access (e.g., via get, get-
   config, or notification) to these data nodes.  These are the subtrees
   and data nodes and their sensitivity/vulnerability:

     <list subtrees and data nodes and state why they are sensitive>



























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6.  Acknowledgments

   The authors want to thank Wes Hardaker and David Spakes for their
   reviews and valuable comments.















































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7.  References

7.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC6020]  Bjorklund, M., "YANG - A Data Modeling Language for the
              Network Configuration Protocol (NETCONF)", RFC 6020,
              October 2010.

   [RFC6241]  Enns, R., Bjorklund, M., Schoenwaelder, J., and A.
              Bierman, "Network Configuration Protocol (NETCONF)",
              RFC 6241, June 2011.

   [RFC6242]  Wasserman, M., "Using the NETCONF Protocol over Secure
              Shell (SSH)", RFC 6242, June 2011.

7.2.  Informative References

   [RFC3411]  Harrington, D., Presuhn, R., and B. Wijnen, "An
              Architecture for Describing Simple Network Management
              Protocol (SNMP) Management Frameworks", STD 62, RFC 3411,
              December 2002.

   [RFC3412]  Case, J., Harrington, D., Presuhn, R., and B. Wijnen,
              "Message Processing and Dispatching for the Simple Network
              Management Protocol (SNMP)", STD 62, RFC 3412,
              December 2002.

   [RFC3413]  Levi, D., Meyer, P., and B. Stewart, "Simple Network
              Management Protocol (SNMP) Applications", STD 62,
              RFC 3413, December 2002.

   [RFC3414]  Blumenthal, U. and B. Wijnen, "User-based Security Model
              (USM) for version 3 of the Simple Network Management
              Protocol (SNMPv3)", STD 62, RFC 3414, December 2002.

   [RFC3415]  Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based
              Access Control Model (VACM) for the Simple Network
              Management Protocol (SNMP)", STD 62, RFC 3415,
              December 2002.

   [RFC3418]  Presuhn, R., "Management Information Base (MIB) for the
              Simple Network Management Protocol (SNMP)", STD 62,
              RFC 3418, December 2002.

   [RFC3584]  Frye, R., Levi, D., Routhier, S., and B. Wijnen,



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              "Coexistence between Version 1, Version 2, and Version 3
              of the Internet-standard Network Management Framework",
              BCP 74, RFC 3584, August 2003.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              January 2004.

   [RFC5591]  Harrington, D. and W. Hardaker, "Transport Security Model
              for the Simple Network Management Protocol (SNMP)",
              RFC 5591, June 2009.

   [RFC5592]  Harrington, D., Salowey, J., and W. Hardaker, "Secure
              Shell Transport Model for the Simple Network Management
              Protocol (SNMP)", RFC 5592, June 2009.

   [RFC6353]  Hardaker, W., "Transport Layer Security (TLS) Transport
              Model for the Simple Network Management Protocol (SNMP)",
              RFC 6353, July 2011.

































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Appendix A.  Example configurations

A.1.  Engine Configuration Example

   Below is an XML instance document showing a configuration of an SNMP
   engine listening on UDP port 161 on IPv4 and IPv6 endpoints and
   accepting SNMPv2c and SNMPv3 messages.

   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <engine>
       <enabled>true</enabled>
       <listen>
         <udp>
           <ip>0.0.0.0</ip>
           <port>161</port>
         </udp>
         <udp>
           <ip>::</ip>
           <port>161</port>
         </udp>
       </listen>
       <version>
         <v2c/>
         <v3/>
       </version>
       <engine-id>80:00:02:b8:04:61:62:63</engine-id>
     </engine>
   </snmp>

A.2.  Community Configuration Example

   Below is an XML instance document showing a configuration that maps
   the community name "public" to the security-name "community-public"
   on the local engine with the default context name.  The target tag
   "community-public-access" filters the access to this community name.
















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   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <community>
       <index>1</index>
       <text-name>public</text-name>
       <security-name>community-public</security-name>
       <target-tag>community-public-access</target-tag>
     </community>
     <target>
       <name>bluebox</name>
       <udp>
         <ip>2001:db8::abcd</ip>
         <port>161</port>
       </udp>
       <tag>blue</tag>
       <v2c>
         <security-name>community-public</security-name>
       </v2c>
     </target>
   </snmp>

A.3.  User-based Security Model Configuration Example

   Below is an XML instance document showing the configuration of a
   local user "joey" who has no authentication or privacy keys.  For the
   remote SNMP engine identified by the snmpEngineID
   '800002b804616263'H, two users are configure.  The user "matt" has a
   localized SHA authentication key and the user "russ" has a localized
   SHA authentication key and an AES encryption key.

   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <usm>
       <local>
         <user>
           <name>joey</name>
         </user>
       </local>
       <remote>
         <engine-id>00:00:00:00:00:00:00:00:00:00:00:02</engine-id>
         <user>
           <name>matt</name>
           <auth>
             <sha>
               <!--
                   The 'key' value is split into two lines to match
                   the RFC formatting rules.
               -->
               <key>66:95:fe:bc:92:88:e3:62:82:23:
                    5f:c7:15:1f:12:84:97:b3:8f:3f</key>



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             </sha>
           </auth>
         </user>
         <user>
           <name>russ</name>
           <auth>
             <sha>
               <!--
                   The 'key' value is split into two lines to match
                   the RFC formatting rules.
               -->
               <key>66:95:fe:bc:92:88:e3:62:82:23:
                    5f:c7:15:1f:12:84:97:b3:8f:3f</key>
             </sha>
           </auth>
           <priv>
             <aes>
               <!--
                   The 'key' value is split into two lines to match
                   the RFC formatting rules.
               -->
               <key>66:95:fe:bc:92:88:e3:62:82:23:
                    5f:c7:15:1f:12:84</key>
             </aes>
           </priv>
         </user>
       </remote>
     </usm>
     <target>
       <name>bluebox</name>
       <udp>
         <ip>2001:db8::abcd</ip>
         <port>161</port>
       </udp>
       <tag>blue</tag>
       <usm>
         <user-name>matt</user-name>
         <security-level>auth-no-priv</security-level>
       </usm>
     </target>
   </snmp>

A.4.  Target and Notification Configuration Example

   Below is an XML instance document showing the configuration of a
   notification generator application (see Appendix A of [RFC3413]).
   Note that the USM specific objects are defined in the ietf-snmp-
   usm.yang submodule.



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   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <target>
       <name>addr1</name>
       <udp>
         <ip>192.0.2.3</ip>
         <port>162</port>
       </udp>
       <tag>group1</tag>
       <usm>
         <user-name>joe</user-name>
         <security-level>auth-no-priv</security-level>
       </usm>
     </target>
     <target>
       <name>addr2</name>
       <udp>
         <ip>192.0.2.6</ip>
         <port>162</port>
       </udp>
       <tag>group1</tag>
       <usm>
         <user-name>joe</user-name>
         <security-level>auth-no-priv</security-level>
       </usm>
     </target>
     <target>
       <name>addr3</name>
       <udp>
         <ip>192.0.2.9</ip>
         <port>162</port>
       </udp>
       <tag>group2</tag>
       <usm>
         <user-name>bob</user-name>
         <security-level>auth-priv</security-level>
       </usm>
     </target>
     <notify>
       <name>group1</name>
       <tag>group1</tag>
       <type>trap</type>
     </notify>
     <notify>
       <name>group2</name>
       <tag>group2</tag>
       <type>trap</type>
     </notify>
   </snmp>



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A.5.  Proxy Configuration Example

   Below is an XML instance document showing the configuration of a
   proxy forwarder application.  It proxies SNMPv2c messages from
   command generators to a file server running a SNMPv1 agent that
   recognizes two community strings, "private" and "public", with
   different associated read views.  The fileserver is represented as
   two "target" instances, one for each community string.

   If the proxy receives a SNMPv2c message with the community string
   "public" from a device in the "Office Network" or "Home Office
   Network", it gets tagged as "trusted", and the proxy uses the
   "private" community string when sending the message to the file
   server.  Other SNMPv2c messages with the community string "public"
   get tagged as "non-trusted", and the proxy uses the "public"
   community string for these messages.  There is also a special
   "backdoor" community string that can be used from any location to get
   "trusted" access.

   The "Office Network" and "Home Office Network" are represented as two
   "target" instances.

   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <target>
       <name>File Server (private)</name>
       <udp>
         <ip>192.0.2.1</ip>
       </udp>
       <v1>
         <security-name>private</security-name>
       </v1>
     </target>
     <target>
       <name>File Server (public)</name>
       <udp>
         <ip>192.0.2.1</ip>
       </udp>
       <v1>
         <security-name>public</security-name>
       </v1>
     </target>
     <target>
       <name>Office Network</name>
       <udp>
         <ip>192.0.2.0</ip>
         <prefix-length>24</prefix-length>
       </udp>
       <tag>office</tag>



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     </target>
     <target>
       <name>Home Office Network</name>
       <udp>
         <ip>203.0.113.0</ip>
         <prefix-length>24</prefix-length>
       </udp>
       <tag>home-office</tag>
     </target>

     <!--
         Communities c1,c2,c3, and c4 are used for incoming messages
         that should be forwarded.

         Communities c3 and c5 are used for outgoing messages to the
         file server.
     -->
     <community>
        <index>c1</index>
        <security-name>public</security-name>
        <engine-id>80:00:61:81:c8</engine-id>
        <context>trusted</context>
        <target-tag>office</target-tag>
     </community>
     <community>
        <index>c2</index>
        <security-name>public</security-name>
        <engine-id>80:00:61:81:c8</engine-id>
        <context>trusted</context>
        <target-tag>home-office</target-tag>
     </community>
     <community>
        <index>c3</index>
        <security-name>public</security-name>
        <engine-id>80:00:61:81:c8</engine-id>
        <context>not-trusted</context>
     </community>
     <community>
        <index>c4</index>
        <text-name>backdoor</text-name>
        <security-name>public</security-name>
        <engine-id>80:00:61:81:c8</engine-id>
        <context>trusted</context>
     </community>
     <community>
        <index>c5</index>
        <security-name>private</security-name>
        <engine-id>80:00:61:81:c8</engine-id>



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        <context>trusted</context>
     </community>

     <proxy>
        <name>p1</name>
        <type>read</type>
        <context-engine-id>80:00:61:81:c8</context-engine-id>
        <context-name>trusted</context-name>
        <params-in>
          <v2c>
            <security-name>public</security-name>
          </v2c>
        </params-in>
        <single-target-out>File Server (private)</single-target-out>
     </proxy>
     <proxy>
        <name>p2</name>
        <type>read</type>
        <context-engine-id>80:00:61:81:c8</context-engine-id>
        <context-name>not-trusted</context-name>
        <params-in>
          <v2c>
            <security-name>public</security-name>
          </v2c>
        </params-in>
        <single-target-out>File Server (public)</single-target-out>
     </proxy>
   </snmp>

   If an SNMPv2c Get request with community string "public" is received
   from an IP address tagged as "office" or "home-office", or if the
   request is received from anywhere else with community string
   "backdoor", the implied context is "trusted" and so proxy entry "p1"
   matches.  The request is forwarded to the file server as SNMPv1 with
   community "private" using community table entry "c5" for outbound
   params lookup.

   If an SNMPv2c Get request with community string "public" is received
   from any other IP address, the implied context is "not-trusted" so
   proxy entry "p2" matches, and the request is forwarded to the file
   server as SNMPv1 with community "public".

A.6.  View-based Access Control Model Configuration Example

   Below is an XML instance document showing the minimum-secure VACM
   configuration (see Appendix A of [RFC3415]).





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   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <vacm>
       <group>
         <name>initial</name>
         <member>
           <security-name>initial</security-name>
           <security-model>usm</security-model>
         </member>
         <access>
           <context></context>
           <security-model>usm</security-model>
           <security-level>no-auth-no-priv</security-level>
           <read-view>restricted</read-view>
           <notify-view>restricted</notify-view>
         </access>
         <access>
           <context></context>
           <security-model>usm</security-model>
           <security-level>auth-no-priv</security-level>
           <read-view>internet</read-view>
           <write-view>internet</write-view>
           <notify-view>internet</notify-view>
         </access>
       </group>
       <view>
         <name>initial</name>
         <include>1.3.6.1</include>
       </view>
       <view>
         <name>restricted</name>
         <include>1.3.6.1</include>
       </view>
     </vacm>
   </snmp>

   The following XML instance document shows the semi-secure VACM
   configuration (only the view configuration is different).














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   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <vacm>
       <group>
         <name>initial</name>
         <member>
           <security-name>initial</security-name>
           <security-model>usm</security-model>
         </member>
         <access>
           <context></context>
           <security-model>usm</security-model>
           <security-level>no-auth-no-priv</security-level>
           <read-view>restricted</read-view>
           <notify-view>restricted</notify-view>
         </access>
         <access>
           <context></context>
           <security-model>usm</security-model>
           <security-level>auth-no-priv</security-level>
           <read-view>internet</read-view>
           <write-view>internet</write-view>
           <notify-view>internet</notify-view>
         </access>
       </group>
       <view>
         <name>initial</name>
         <include>1.3.6.1</include>
       </view>
       <view>
         <name>restricted</name>
         <include>1.3.6.1.2.1.1</include>
         <include>1.3.6.1.2.1.11</include>
         <include>1.3.6.1.6.3.10.2.1</include>
         <include>1.3.6.1.6.3.11.2.1</include>
         <include>1.3.6.1.6.3.15.1.1</include>
       </view>
     </vacm>
   </snmp>

A.7.  Transport Layer Security Transport Model Configuration Example

   Below is an XML instance document showing the configuration of the
   certificate to security name mapping (see Appendix A.2 and A.3 of
   [RFC6353]).







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   <snmp xmlns="urn:ietf:params:xml:ns:yang:ietf-snmp">
     <tlstm>
       <cert-to-tm-security-name>
         <id>1</id>
         <fingerprint>11:0A:05:11:00</fingerprint>
         <map-type>san-any</map-type>
       </cert-to-tm-security-name>
       <cert-to-tm-security-name>
         <id>2</id>
         <fingerprint>11:0A:05:11:00</fingerprint>
         <map-type>specified</map-type>
         <cert-specified-tm-security-name>
           Joe Cool
         </cert-specified-tm-security-name>
       </cert-to-tm-security-name>
     </tlstm>
   </snmp>


































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Authors' Addresses

   Martin Bjorklund
   Tail-f Systems

   Email: mbj@tail-f.com


   Juergen Schoenwaelder
   Jacobs University

   Email: j.schoenwaelder@jacobs-university.de







































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