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Versions: 00

Network Working Group                                       S. Litkowski
Internet-Draft                                                    Orange
Intended status: Standards Track                           June 17, 2014
Expires: December 19, 2014


                   Yang Data Model for ISIS protocol
                   draft-litkowski-netmod-isis-cfg-00

Abstract

   This document defines a YANG data model that can be used to configure
   and manage ISIS protocol.

Requirements Language

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

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 December 19, 2014.

Copyright Notice

   Copyright (c) 2014 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



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   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Design of the data model  . . . . . . . . . . . . . . . . . .   2
     2.1.  Authentication parameters . . . . . . . . . . . . . . . .   4
     2.2.  Multitopology parameters  . . . . . . . . . . . . . . . .   4
     2.3.  Per level parameters  . . . . . . . . . . . . . . . . . .   4
     2.4.  Per interface parameters  . . . . . . . . . . . . . . . .   5
     2.5.  Operational states  . . . . . . . . . . . . . . . . . . .   6
   3.  Yang module . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  22
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  22
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  22
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  22
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  22

1.  Introduction

   This document defines a YANG data model that can be used to configure
   and manage ISIS protocol.

2.  Design of the data model

   The ISIS Yang module is divided in two main containers :

   o  isis-cfg : that contains writable configuration objects.

   o  isis-op : that contains read-only states.

   Each of this container contains a list of instances as many
   implementations are currently supporting multiple ISIS instances
   within a single virtual-router.

   The figure below describe the overall structure of the isis Yang
   module :

       module: isis
          +--rw isis-cfg
          |  +--rw instances
          |     +--rw instance [name]
          |        +--rw name
          |        +--rw enabled
          |        +--rw isis-level
          |        +--rw area



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          |        +--rw system-id
          |        +--rw ipv4-router-id
          |        +--rw ipv6-router-id
          |        +--rw reference-bandwidth
          |        +--rw lsp-mtu
          |        +--rw lsp-lifetime
          |        +--rw lsp-refresh
          |        +--rw isis-authentication-cfg
          |        |   ...
          |        +--rw multi-topology-cfg
          |        |   ...
          |        +--rw isis-level-1-cfg
          |        |   ...
          |        +--rw isis-level-2-cfg
          |        |   ...
          |        +--rw overload
          |        |   ...
          |        +--rw interfaces
          |           +--rw interface [name]
          |              ...
          |
          +--ro isis-op
             +--ro instances
                +--ro instance [name]
                     +--ro adjacencies
                     |  +--ro adjacency [interface]
                     |     +--ro interface
                     |     +--ro level
                     |     +--ro state
                     +--ro spf-log
                     |   +--ro event [id]
                     |      +--ro id
                     |      +--ro level
                     |      +--ro spf-type
                     |      +--ro spf-delay
                     |      +--ro schedule-timestamp
                     |      +--ro start-timestamp
                     |      +--ro end-timestamp
                     |      +--ro trigger-lsp [lsp]
                     |         +--ro lsp
                     |         +--ro sequence
                     +--ro lsp-log
                     |   +--ro event [id]
                     |      +--ro id
                     |      +--ro level
                     |      +--ro lsp
                     |         +--ro lsp
                     |         +--ro sequence



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                     |      +--ro received-timestamp
                     +--ro database
                     |  +--ro level-1
                     |      ...
                     |  +--ro level-2
                     |      ...
                     +--ro hostnames
                        +--ro hostname [system-id]
                           +--ro system-id
                           +--ro hostname





2.1.  Authentication parameters

   The following figure describes the global authentication parameters
   for a particular ISIS instance.

       +--rw isis-authentication-cfg
          +--rw psnp-authentication
          +--rw csnp-authentication
          +--rw hello-authentication
          +--rw authentication-key
          +--rw authentication-type

2.2.  Multitopology parameters

   The multitopology section is used to enable support of MT extensions
   for specific address families.

       +--rw multi-topology-cfg
          +--rw ipv4-unicast
          +--rw ipv6-unicast
          +--rw ipv4-multicast
          +--rw ipv6-multicast

2.3.  Per level parameters

   The level parameter section of the ISIS instance describes the global
   parameters for level 1 and 2 including authentication, protocol
   preferences, default metrics ...








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       +--rw isis-level-1-cfg
          +--rw enabled
          +--rw psnp-authentication
          +--rw csnp-authentication
          +--rw hello-authentication
          +--rw authentication-key
          +--rw authentication-type
          +--rw metric-type
          +--rw preference
          +--rw external-preference
          +--rw default-ipv4-unicast-metric
          +--rw default-ipv6-unicast-metric
          +--rw default-ipv4-multicast-metric
          +--rw default-ipv6-multicast-metric


2.4.  Per interface parameters

   The per-interface section of the ISIS instance describes the
   interface specific parameters.

       +--rw interface [name]
          +--rw name
          +--rw level
          +--rw lsp-interval
          +--rw passive
          +--rw csnp-interval
          +--rw hello-authentication-type
          +--rw hello-authentication-key
          +--rw hello-interval
          +--rw hello-multiplier
          +--rw hello-padding
          +--rw ipv4-unicast
          +--rw ipv6-unicast
          +--rw ipv4-multicast
          +--rw ipv6-multicast
          +--rw interface-type
          +--rw enabled
          +--rw tag
          +--rw level-1
          |  +--rw hello-authentication-type
          |  +--rw hello-authentication-key
          |  +--rw hello-interval
          |  +--rw hello-multiplier
          |  +--rw ipv4-unicast
          |  +--rw ipv6-unicast
          |  +--rw ipv4-multicast
          |  +--rw ipv6-multicast



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          |  +--rw priority
          |  +--rw ipv4-unicast-metric
          |  +--rw ipv6-unicast-metric
          |  +--rw ipv4-multicast-metric
          |  +--rw ipv6-multicast-metric
          |  +--rw passive
          |
          +--rw level-2
             +--rw hello-authentication-type
             +--rw hello-authentication-key
             +--rw hello-interval
             +--rw hello-multiplier
             +--rw ipv4-unicast
             +--rw ipv6-unicast
             +--rw ipv4-multicast
             +--rw ipv6-multicast
             +--rw priority
             +--rw ipv4-unicast-metric
             +--rw ipv6-unicast-metric
             +--rw ipv4-multicast-metric
             +--rw ipv6-multicast-metric
             +--rw passive

2.5.  Operational states

   isis-op container provides operational states for ISIS.  This
   container is divided in multiple components :

   o  adjacencies : provides state information about current ISIS
      adjacencies.

   o  spf-log : provides information about SPF events on the node.

   o  lsp-log : provides information about LSP events on the node
      (reception of an LSP or modification of local LSP).

   o  database : provides details on current LSDB.

   o  Hostname : provides information about system-id to hostname
      mappings.

3.  Yang module

module isis {
    namespace TBD;

    prefix isis;




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    import ietf-routing {
        prefix "rt";
    }

    import ietf-inet-types {
        prefix inet;
    }

    import ietf-yang-types {
        prefix yang;
    }

    contact
        "Stephane Litkowski

         Email : stephane.litkowski@orange.com";

    description
        "The YANG module defines a generic configuration model for ISIS
        common across all of the vendor implementations.";


    revision 2014-06-11 {
        description "Initial revision.";
    }
    identity isis {
        base rt:routing-protocol;
        description "Identity for the ISIS routing protocol.";
    }
    typedef isis-level {
        type enumeration {
            enum level-1;
            enum level-2;
            enum level-1-2;
        }
    }

    typedef isis-wide-metric {
        type uint32 {
            range "0 .. 16777215";
        }
    }

    typedef isis-std-metric {
        type uint8 {
            range "0 .. 63";
        }
    }



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    grouping isis-route-content {
        leaf metric {
            type uint32;
        }
        leaf-list tag {
            type uint32;
        }
        leaf route-type {
            type enumeration {
                enum l2-up-internal;
                enum l1-up-internal;
                enum l2-up-external;
                enum l1-up-external;
                enum l2-down-internal;
                enum l1-down-internal;
                enum l2-down-external;
                enum l1-down-external;
            }
        }
    }

    augment "/rt:routing/rt:routing-state/rt:ribs/rt:rib/rt:routes/rt:route" {
        when "rt:source-protocol = 'isis:isis'" {
            description "ISIS-specific route attributes.";
        }
        uses isis-route-content;
      }

    augment "/rt:active-route/rt:output/rt:route/"
       {
        description "ISIS-specific route attributes.";
        uses isis-route-content;
      }


    grouping isis-prefix-ipv4-std {
        leaf up-down {
            description "This leaf expresses the value of up/down bit.";
            type boolean;
        }
        leaf i-e {
            description "This leaf expresses the value of I/E bit.";
            type boolean;
        }
        leaf ip-prefix {
            type inet:ipv4-address;
        }
        leaf prefix-len {



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            type uint8;
        }
        leaf default-metric {
            type isis-std-metric;
        }
        leaf delay-metric {
            type isis-std-metric;
        }
        leaf expense-metric {
            type isis-std-metric;
        }
        leaf error-metric {
            type isis-std-metric;
        }
    }

    grouping isis-prefix-ipv4-extended {
        leaf up-down {
            description "This leaf expresses the value of up/down bit.";
            type boolean;
        }
        leaf ip-prefix {
            type inet:ipv4-address;
        }
        leaf prefix-len {
            type uint8;
        }

        leaf metric {
            type isis-wide-metric;
        }
        leaf-list SUBTLV1 {
            type uint32;
        }
    }

    grouping isis-prefix-ipv6-extended {
        leaf up-down {
            description "This leaf expresses the value of up/down bit.";
            type boolean;
        }
        leaf ip-prefix {
            type inet:ipv6-address;
        }
        leaf prefix-len {
            type uint8;
        }




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        leaf metric {
            type isis-wide-metric;
        }
        leaf-list SUBTLV1 {
            type uint32;
        }
    }

    grouping isis-neighbor-extended {
        leaf system-id {
            type string;
        }
        leaf metric {
            type isis-wide-metric;
        }
    }

    grouping isis-database {
        leaf id {
            type string;
        }
        leaf checksum {
            type uint16;
        }
        leaf sequence {
            type uint32;
        }
        leaf attributes {
            type bits {
                bit PARTITIONNED;
                bit ATTACHED-ERROR;
                bit ATTACHED-EXPENSE;
                bit ATTACHED-DELAY;
                bit ATTACHED-DEFAULT;
                bit OVERLOAD;
            }
        }
        leaf isis-level {
            type isis-level;
        }

        container TLV10 {
            description "This leaf describes authentication information of the node.";
            leaf authentication-type {
                type uint8;
            }
            leaf authentication-key {
                type string;



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            }
        }
        container TLV22 {
            list neighbor {
                key "system-id";
                uses isis-neighbor-extended;


            }
        }

        container TLV128 {
            list ip-internal-reachability {
                key "ip-prefix";
                uses isis-prefix-ipv4-std;
            }
        }

        leaf-list TLV129 {
            description "This leaf describes the protocol supported by the node.";
            type uint8;
        }

        container TLV130 {
            list ip-external-reachability {
                key "ip-prefix";
                uses isis-prefix-ipv4-std;
            }
        }

        leaf-list TLV132 {
            description "This leaf describes the ipv4 addresses of the node.";
            type inet:ipv4-address;
        }

        leaf TLV134 {
            description "This leaf describes the IPv4 Traffic Engineering router ID of the node.";
            type inet:ipv4-address;
        }

        container TLV135 {
            list extended-ip-reachability {
                key "ip-prefix";
                uses isis-prefix-ipv4-extended;
            }
        }

        leaf TLV137 {



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            description "This leaf describes the name of the node.";
            type string;
        }

        leaf TLV140 {
            description "This leaf describes the IPv6 Traffic Engineering router ID of the node.";
            type inet:ipv6-address;
        }


        container TLV222 {
            list neighbor {
                key "system-id";
                leaf MT-ID {
                    type uint16 {
                        range "0 .. 4095";
                    }
                }
                uses isis-neighbor-extended;


            }
        }

        container TLV229 {
            description "This leaf describes the MT entries.";
            list topology {
                key "MT-ID";

                leaf MT-ID {
                    type uint16 {
                        range "0 .. 4095";
                    }
                }

                leaf attributes {
                    type bits {
                        bit OVERLOAD;
                        bit ATTACHED;
                    }
                }
            }
        }

        leaf-list TLV232 {
            description "This leaf describes the ipv6 addresses of the node.";
            type inet:ipv6-address;
        }



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        container TLV235 {
            list extended-ip-reachability {
                key "ip-prefix";
                leaf MT-ID {
                    type uint16 {
                        range "0 .. 4095";
                    }
                }
                uses isis-prefix-ipv4-extended;

            }
        }

        container TLV237 {
            list extended-ip-reachability {
                key "ip-prefix";
                leaf MT-ID {
                    type uint16 {
                        range "0 .. 4095";
                    }
                }
                uses isis-prefix-ipv6-extended;

            }
        }

        container TLV236 {
            list extended-ipv6-reachability {
                key "ip-prefix";
                uses isis-prefix-ipv6-extended;
            }
        }

        container TLV242 {
            description "This leaf describes the capabilities of the node. This container may be extended with detailled information.";
            leaf binary {
                type binary;
            }
        }
    }

    grouping address-family-cfg {
        leaf ipv4-unicast {
            description "This leaf defines if IPv4 unicast is activated.";
            type boolean;
        }
        leaf ipv6-unicast {
            description "This leaf defines if IPv6 unicast is activated.";



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            type boolean;
        }
        leaf ipv4-multicast {
            description "This leaf defines if IPv4 multicast is activated.";
            type boolean;
        }
        leaf ipv6-multicast {
            description "This leaf defines if IPv6 multicast is activated.";
            type boolean;
        }
    }

    grouping interface-hello-cfg {
        leaf hello-authentication-type {
            type enumeration {
                enum    none;
                enum    plaintext;
                enum    message-digest;
            }
        }
        leaf hello-authentication-key {
            type string;
        }
        leaf hello-interval {
            description "This leaf defines the interval of hello messages.";
            type uint16;
        }
        leaf hello-multiplier {
            description "This leaf defines the number of hello failed to be received before declaring the adjacency down.";
            type uint16;
        }
    }

    grouping interface-level-cfg {
        uses interface-hello-cfg;

        uses address-family-cfg;

        leaf priority {
            type uint8 {
                range "0 .. 127";
            }
        }
        leaf ipv4-unicast-metric {
            type isis-wide-metric;
        }
        leaf ipv6-unicast-metric {
            type isis-wide-metric;



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        }
        leaf ipv4-multicast-metric {
            type isis-wide-metric;
        }
        leaf ipv6-multicast-metric {
            type isis-wide-metric;
        }
        leaf passive {
            description "This leaf defines if interface is in passive mode (ISIS not running, but network is advertised).";
            type boolean;
            default "false";
        }
    }

    grouping interface-cfg {
        description "ISIS is enabled on interfaces that have an entry in this list, unless 'enabled' is set to 'false' for that entry.";
        leaf name {
            type leafref {
                path "/rt:routing/rt:router/rt:interfaces/rt:interfaces/rt:interface/rt:name";
            }
        }
        leaf level {
            description "This leaf defines the associated ISIS level of the interface.";
            type isis-level;
        }
        leaf lsp-interval {
            description "This leaf defines the interval between LSP transmissions in msec";
            type uint16;
        }
        leaf passive {
            description "This leaf defines if interface is in passive mode (ISIS not running, but network is advertised).";
            type boolean;
            default "false";
        }
        leaf csnp-interval {
            type uint16;
        }

        uses interface-hello-cfg;

        leaf hello-padding {
            description "This leaf defines if ISIS Hellos would be padded up to MTU size.";
            type boolean;
        }

        uses address-family-cfg;





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        leaf interface-type {
            type enumeration {
                enum broadcast;
                enum point-to-point;
            }
        }

        leaf enabled {
            type boolean;
            default "true";
        }

        leaf-list tag {
            description "This leaf defines list of tags associated with the interface.";
            type uint32;
        }

        container level-1 {
            uses interface-level-cfg;
        }

        container level-2 {
            uses interface-level-cfg;
        }
    }

    grouping isis-authentication-cfg {
        leaf psnp-authentication {
            type boolean;
            default "true";
        }
        leaf csnp-authentication {
            type boolean;
            default "true";
        }
        leaf hello-authentication {
            type boolean;
            default "true";
        }
        leaf authentication-key {
            type string;
        }
        leaf authentication-type {
            type enumeration {
                enum    none;
                enum    plaintext;
                enum    message-digest;
            }



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        }
    }

    grouping isis-level-cfg {

        leaf enabled {
            description "This leaf defines the status of the administrative status of the level (Active / not active).";
            type boolean;
            default "true";
        }

        uses isis-authentication-cfg;

        leaf metric-type {
            type enumeration {
                enum wide-only;
                enum old-only;
                enum both;
            }
        }
        leaf preference {
            description "This leaf defines the protocol preference.";
            type uint8;
        }
        leaf external-preference {
            description "This leaf defines the protocol preference for external routes.";
            type uint8;
        }
        leaf default-ipv4-unicast-metric {
            description "This leaf defines the IPv4 unicast default metric.";
            type isis-wide-metric;
        }
        leaf default-ipv6-unicast-metric {
            description "This leaf defines the IPv6 unicast default metric.";
            type isis-wide-metric;
        }
        leaf default-ipv4-multicast-metric {
            description "This leaf defines the IPv4 multicast default metric.";
            type isis-wide-metric;
        }
        leaf default-ipv6-multicast-metric {
            description "This leaf defines the IPv6 multicast default metric.";
            type isis-wide-metric;
        }
    }

    augment "/rt:routing/rt:routing-instance/rt:routing-protocols/rt:routing-protocol/" {
        when "rt:type = 'isis:isis'" {



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            description "This augment is only valid when routing protocol instance type is isis.";
        }
        container isis-cfg {
            container instances {
                description ".";
                list instance {
                    key "name";
                    description "Defines the list of ISIS instances.";
                    leaf name {
                        type string;
                    }
                    leaf enabled {
                        type boolean;
                        default "true";
                    }
                    leaf isis-level {
                        type isis-level;
                    }
                    leaf area-id {
                        type string;
                    }

                    leaf system-id {
                        type string;
                    }
                    leaf ipv4-router-id {
                        description "Router ID value that would be used in TLV134.";
                        type inet:ipv4-address;
                    }
                    leaf ipv6-router-id {
                        description "Router ID value that would be used in TLV234.";
                        type inet:ipv6-address;
                    }
                    leaf reference-bandwidth {
                        description "This leaf defines the bandwidth for calculating metric.";
                        type uint32;
                    }

                    leaf lsp-mtu {
                        description "This leaf describes the maximum size of a LSP PDU in bytes.";
                        type uint16;
                    }
                    leaf lsp-lifetime {
                        description "This leaf describes the lifetime of the router LSP in seconds.";
                        type uint16;
                    }
                    leaf lsp-refresh {
                        description "This leaf describes the refresh interval of the router LSP in seconds.";



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                        type uint16;
                    }

                    uses isis-authentication-cfg;

                    container multi-topology-cfg {
                        description "This container describes activation of MT extensions for supporting new address families.";
                        uses address-family-cfg;
                    }

                    container isis-level-1-cfg {
                        description "Defines configuration parameters of level 1.";

                        uses isis-level-cfg;
                    }

                    container isis-level-2-cfg {
                        description "Defines configuration parameters of level 2.";

                        uses isis-level-cfg;
                    }

                    container overload {
                        description "This leaf describes if the router is set to overload state.";
                        leaf status {
                            type boolean;
                        }
                        leaf timeout {
                            type uint16;
                        }
                    }

                    container interfaces {
                        list interface {
                            key "name";
                            uses interface-cfg;
                        }
                    }
                }
            }
        }

        container isis-op {
            config false;
            container adjacencies {
                description "This container lists the adjacencies of the local node.";
                list adjacency {
                    key interface;



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                    leaf interface {
                        type string;
                    }
                    leaf level {
                        type isis-level;
                    }
                    leaf state {
                        type enumeration {
                            enum "Up";
                            enum "Down";
                            enum "Init";
                        }
                    }
                }
            }
            container spf-log {
                description "This container lists the SPF computation events.";
                list event {
                    key id;

                    leaf id {
                        type uint32;
                    }
                    leaf spf-type {
                        type enumeration {
                            enum full;
                            enum incremental;
                            enum route-only;
                        }
                    }
                    leaf level {
                        type isis-level;
                    }
                    leaf spf-delay {
                        description "This leaf describes the SPF delay that was used for this event.";
                        type uint32;
                    }
                    leaf schedule-timestamp {
                        type yang:timestamp;
                    }
                    leaf start-timestamp {
                        type yang:timestamp;
                    }
                    leaf end-timestamp {
                        type yang:timestamp;
                    }
                    list trigger-lsp {
                        key "lsp";



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                        leaf lsp {
                            type string;
                        }
                        leaf sequence {
                            type uint32;
                        }
                    }

                }
            }
            container lsp-log {
                description "This container lists the LSP reception events.";
                list event {
                    key id;

                    leaf id {
                        type uint32;
                    }
                    leaf level {
                        type isis-level;
                    }
                    container lsp {
                        leaf lsp {
                            type string;
                        }
                        leaf sequence {
                            type uint32;
                        }
                    }

                    leaf received-timestamp {
                        type yang:timestamp;
                    }
                }
            }
            container database {
                container level-1 {
                    list lsp {
                        key id;

                        uses isis-database;

                    }
                }
                container level-2 {
                    list lsp {
                        key id;




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                        uses isis-database;

                    }
                }
            }
            container hostnames {
                list hostname {
                    key system-id;
                    leaf system-id {
                        type string;
                    }
                    leaf hostname {
                        type string;
                    }
                }
            }
        }
    }
}

4.  Security Considerations

5.  Acknowledgements

6.  IANA Considerations

7.  Normative References

   [I-D.ietf-netmod-routing-cfg]
              Lhotka, L., "A YANG Data Model for Routing Management",
              draft-ietf-netmod-routing-cfg-15 (work in progress), May
              2014.

   [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.

Author's Address

   Stephane Litkowski
   Orange

   Email: stephane.litkowski@orange.com





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