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Versions: 00 01 02 03 04 05 06 07 RFC 5907

NTP                                                          H. Gerstung
Internet-Draft                                                  Meinberg
Expires: September 5, 2007                                 March 4, 2007


   Definitions of Managed Objects for Network Time Protocol Version 4
                                (NTPv4)
                      draft-ietf-ntp-ntpv4-mib-01

Status of this Memo

   By submitting this Internet-Draft, each author represents that any
   applicable patent or other IPR claims of which he or she is aware
   have been or will be disclosed, and any of which he or she becomes
   aware will be disclosed, in accordance with Section 6 of BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   The list of current Internet-Drafts can be accessed at
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   This Internet-Draft will expire on September 5, 2007.

Copyright Notice

   Copyright (C) The IETF Trust (2007).

Abstract

   The Network Time Protocol (NTP) is used in networks of all types and
   sizes for time synchronization of servers, workstations and other
   networked equipment.  As time synchronization is more and more a
   mission critical service, standardized means for monitoring and
   management of this subsystem of a networked host are required to
   allow operators of such a service to setup a monitoring system that
   is platform- and vendor-independant.  This RFC draft provides a
   standardized collection of data objects for monitoring the NTP



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   service of such a network participant and it is part of the NTP
   Version 4 standardization effort.


Table of Contents

   1.  The Internet-Standard Management Framework . . . . . . . . . .  3
   2.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Technical Description  . . . . . . . . . . . . . . . . . . . .  3
   4.  MIB Definition . . . . . . . . . . . . . . . . . . . . . . . .  4
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 20
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 20
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 20
     7.1.  Normative References . . . . . . . . . . . . . . . . . . . 20
     7.2.  Informative References . . . . . . . . . . . . . . . . . . 21
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 21
   Intellectual Property and Copyright Statements . . . . . . . . . . 22


































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1.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC3410 [4].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in RFC2578
   [1], RFC2579 [2] and RFC2580 [3].


2.  Introduction

   The NTPv4 MIB Module is designed to allow SNMP to be used to monitor
   and manage local NTP service instances.  It provides a collection of
   data objects that can be queried using the SNMP protocol and
   represent the current status of the NTP service instance.  This
   includes general information about the NTP service instance itself
   (vendor, product, version) as well as connectivity to upstream NTP
   servers used as sources of reference time and to hardware reference
   clocks like radio clocks.  The most important values are included in
   order to be able to detect failures before they can have an impact on
   the overall time synchronization status of the network.  There are
   also a collection of notification objects to inform about state
   changes in the NTP service.  There are objects to control these
   notifications as well.


3.  Technical Description

   The NTPv4 MIB Module is divided into sections for general server
   information, current NTP service status, status information of all
   mobilized associations (e.g. unicast upstream time servers, multicast
   or broadcast time references and hardware clocks), NTP service
   control objects, NTP objects used only for notifications, as well as
   SNMP notification definitions for core events.

   The general server information section contains static information
   and can be queried to identify which NTP service implementation is
   running on a host.  This includes the vendor and product name of the
   running NTP software as well as version information, hardware/os
   platform identity and the time resolution of the underlying OS.

   Section 2 (current NTP status) includes data objects that represent



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   the current operational status of the NTP service instance.

   The third section contains data objects that represent the set of
   time references ("associations") the NTP instance is currently
   working with.

   The fourth section contains objects that can be used to control the
   NTP service.  The currently defined objects control how often the
   heartbeat interval notification is sent out and which notifications
   are enabled.

   The fifth section contains objects that are only used as varbinds in
   notifications.  There is currently only one object in this section--a
   message that adds a clear text event message to notifications.

   Certain important events can occur while the NTP instance is running.
   The sixth section defines SNMP notifications for a collection of the
   most important ones ("core events") and additionally provides a
   heartbeat notification as well as a test notification to allow
   management systems to test the reception of NTP related notifications
   as well as enable heartbeat-based monitoring systems to assure that
   the NTP service is still up and running.


4.  MIB Definition

-- **************************************************************************
--
--$Id: draft-ietf-ntp-ntpv4-mib-01.xml 1.2 2007/03/05 07:52:46Z heiko TRASH $
--$Name: $
--
--    The Network Time Protocol Version 4
--    Management Information Base (MIB)
--
--    Author: Heiko Gerstung (heiko.gerstung@meinberg.de)
--    for the Internet Engineering Task Force (IETF)
--    NTP Working Group (ntpwg)
--
--
-- **************************************************************************
--
--  $Log: draft-ietf-ntp-ntpv4-mib-01.xml $
--  Revision 1.2  2007/03/05 07:52:46Z  heiko
--  - registered as -01 in revision control
--  Revision 1.1  2007/03/05 07:52:17Z  heiko
--  Initial revision
--  Revision 1.10  2007/03/05 07:49:21Z  heiko
--  - changed document date



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--  Revision 1.9  2007/03/04 06:59:44Z  chelliot
--  MIB:
--  - Added time objects, comments, changed notifications
--  - Changed server to service
--  Revision 1.8  2006/10/23 03:37:44Z  chelliot
--  MIB:
--  - Changed various object types, added notification control object
--  Revision 1.7  2006/06/16 07:13:50Z  heiko
--  XML/RFC:
--  - added/changed comments about the to-be-done IANA SMI assignment
--  Revision 1.6  2006/06/16 07:04:43Z  heiko
--  RFC/XML:
--  - phone number corrected
--  - removed unused references
--  MIB:
--    - added ntpSrvTimePrecision
--    - changed INTEGER objects to Integer32
--    - changed default value for ntpSrvStatusStratum from 99 to 16
--    - changed default value for ntpSrvStatusActiveRefclockId from 99 to 0
--    - changed object names to ntpSrvStatusActiveRefSourceName
--      (from ntpSrvStatusActiveRefclockName) and to
--      ntpSrvStatusNumberOfRefSources (from ntpSrvStatusNumberOfRefclocks)
--    - removed ntpSrvStatusAuthKeyId object
--    - added ntpSrvStatusDispersion to provide the current root dispersion
--    - major rework of section 3 (Status of associations) to compile cleanly
--      including:
--      - added dispersion to the association dataset
--      - renaming of objects
--      - added an index to the association table
--      - formal changes
--    - traps are now reverse mappable
--    - traps are now define with payload where applicable
--    - added compliance statements
--  Revision 1.5  2006/02/27 08:28:16Z  heiko
--  - changed to RFC format and added header as well as
--    introduction and technical description
--  - added other necessary RFC components (copyright statement etc.)
--  Revision 1.4  2006/02/27 07:06:49Z  heiko
--  - removed all objects with data type REAL
--  - everything that needs to be floating point is now defined as
--    DisplayString
--  Revision 1.2  2006/01/23 08:58:11Z  heiko
--  - changed the datatype of offset, jitter and delay objects from Integer32
--    to REAL
--
-- **************************************************************************

NTPv4-MIB DEFINITIONS ::= BEGIN



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IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE , mib-2, Integer32, NOTIFICATION-TYPE,
    Unsigned32
        FROM SNMPv2-SMI
    MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
        FROM SNMPv2-CONF
    DisplayString
        FROM SNMPv2-TC
    InetAddressType, InetAddress
        FROM INET-ADDRESS-MIB;

ntpSnmpMIB MODULE-IDENTITY
    LAST-UPDATED "200703040000Z" -- March 4, 2007
    ORGANIZATION "The IETF NTP Working Group (ntpwg)"
    CONTACT-INFO
            "     WG Email:
                  Subscribe:

                  Editor 1 name
                  Title
                  Employeer
                  Address
                  Phone
                  email

                  Editor 2 name..."
    DESCRIPTION
        "The Management Information Base for NTP time services."
    REVISION     "200703040000Z"
    DESCRIPTION
        "More MIB review modifications."
    REVISION     "200610230000Z"
    DESCRIPTION
        "Modifications from MIB review."
    REVISION     "200606190000Z"
    DESCRIPTION
        "First Draft Version"
    REVISION     "200512190000Z"
    DESCRIPTION
        "revised edition (added traps and stuff)"
    REVISION     "200511160000Z"
    DESCRIPTION
        "Initial draft"
    ::= { mib-2 XXX }


ntpSnmpMIBObjects  OBJECT IDENTIFIER ::= { ntpSnmpMIB 1 }




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-- MIB contains 4 groups

ntpSrvInfo         OBJECT IDENTIFIER ::= { ntpSnmpMIBObjects 1 }
ntpSrvStatus       OBJECT IDENTIFIER ::= { ntpSnmpMIBObjects 2 }
ntpAssociation     OBJECT IDENTIFIER ::= { ntpSnmpMIBObjects 3 }
ntpSrvControl      OBJECT IDENTIFIER ::= { ntpSnmpMIBObjects 4 }
ntpSrvNotifObjects OBJECT IDENTIFIER ::= { ntpSnmpMIBObjects 5 }
ntpSrvNotifPrefix  OBJECT IDENTIFIER ::= { ntpSnmpMIBObjects 6 }

--
-- Section 1: General Service information objects
--            (relatively static information)
--

ntpSrvSoftwareName OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The product name of the installed NTP version."
    -- the product name of the running ntp implementation, e.g. "ntpd"
    ::= { ntpSrvInfo  1 }

ntpSrvSoftwareVersion OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The software version of the installed NTP implementation."
    -- full version string, e.g. "ntpd-4.2.0b@1.1433 ..."
    ::= { ntpSrvInfo  2 }

ntpSrvSoftwareVersionVal OBJECT-TYPE
    SYNTAX      Unsigned32
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "Software version of installed NTP as an unsigned integer value."
    -- e.g. if version string is "4.2.0b" this could be translated into 4202
    -- could be useful to find out if version of service on a is newer or older
    -- than version of the service on b (without too much string parsing trouble)
    ::= { ntpSrvInfo 3 }

ntpSrvSoftwareVendor OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION



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        "The vendor/author of the installed NTP version."
    ::= { ntpSrvInfo  4 }

ntpSrvSystemType OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "General hardware/os platform information."
    -- e.g. "Linux 2.6.12 / x86"
    -- freely configurable, default is OS Version / Hardware platform
    ::= { ntpSrvInfo  5 }

ntpSrvTimeResolution OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "A string describing the time resolution of the running NTP
         implementation."
    -- e.g. "100 ns"
    -- depends on the NTP implementation and the underlying OS. The current
    -- resolution should be used, so if the OS only supports 10ms and ntpd is
    -- capable of 1ns, the 10ms should be advertised
    ::= { ntpSrvInfo  6 }

ntpSrvTimeResolutionVal OBJECT-TYPE
    SYNTAX      Unsigned32
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The time resolution in integer format."
    -- ntpSrvTimeResolution in Integer format
    -- shows the resolution based on 1 second, e.g. "1ms" translates to 1000
    ::= { ntpSrvInfo  7 }

ntpSrvTimePrecision OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "A string describing the precision with which the NTP service
         implementation/OS manages its time base."
    -- e.g. "-18" means 2^-18 = 0.000003814697265625 seconds
    --      "-5" means 2^-5 = 0.03125 seconds
    -- depends on the NTP implementation and the underlying OS.
    ::= { ntpSrvInfo  8 }




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ntpSrvTimePrecisionVal OBJECT-TYPE
    SYNTAX      Integer32
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The service's precision in integer format."
    -- ntpSrvTimePrecision in signed Integer format
    -- shows the precision. A value of -5 would mean 2^-5 = 31.25 ms
    ::= { ntpSrvInfo  9 }

ntpSrvTimeDistance OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The distance from this NTP instance to the root time reference
        (stratum 0) source."
    -- including the unit
    -- e.g. "13.243 ms"
    ::= { ntpSrvInfo  10 }

--
-- Section 2: Current NTP status (dynamic information)
--

ntpSrvStatusCurrentState OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The actual status of NTP as a string"
    --- possible strings:
    --- "not running" : NTP is not running
    --- "not synchronized" : NTP is not synchronized to any time source
    ---   (stratum = 16)
    --- "none configured" : NTP is not synchronized and does not have a server
    ---                     configured
    ---   (stratum = 16)
    --- "sync to local" : NTP is synchronized to own local clock
    ---   (degraded reliability)
    --- "sync to refclock" : NTP is synchronized to a local hardware refclock
    ---   (e.g. GPS)
    --- "sync to remote server" : NTP is synchronized to a remote NTP server
    ---   ("upstream" server)
    --- "unknown" : The state of NTP is unknown.
    ::= { ntpSrvStatus 1 }

ntpSrvStatusCurrentStateVal OBJECT-TYPE



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    SYNTAX      INTEGER {
                            notRunning(1),
                            notSynchronized(2),
                            noneConfigured(3),
                            syncToLocal(4),
                            syncToRefclock(5),
                            syncToRemoteServer(6),
                            unknown(99)
                        }
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The current state of the NTP as integer value."
    -- see ntpSrvStatusCurrentState
    DEFVAL { 99 }
    ::= { ntpSrvStatus 2 }

ntpSrvStatusStratum OBJECT-TYPE
    SYNTAX      Unsigned32 (1..16)
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The NTP service's own stratum value."
    -- should be stratum of syspeer + 1 (or 16 if no syspeer)
    DEFVAL { 16 }
    ::= { ntpSrvStatus 3 }

ntpSrvStatusActiveRefSourceId OBJECT-TYPE
    SYNTAX      Unsigned32 ( 0..99999 )
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The association ID of the current syspeer."
    DEFVAL { 0 }
    ::= { ntpSrvStatus 4 }

ntpSrvStatusActiveRefSourceName OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The hostname/descriptive name of the current reference source
         selected as syspeer."
    -- e.g. "ntp1.ptb.de" or "GPS" or "DCFi" ...
    -- maybe something like "RefClk(8)" = "hardware clock using driver 8"
    -- would be nice
    ::= { ntpSrvStatus 5 }




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ntpSrvStatusActiveOffset OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The Time offset to the current selected reference time source as
         a string."
    -- including unit, e.g. "0.032 ms" or "1.232 s"
    ::= { ntpSrvStatus 6 }

ntpSrvStatusNumberOfRefSources OBJECT-TYPE
    SYNTAX      Unsigned32 (0..99)
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The number of reference sources configured for NTP."
    DEFVAL { 0 }
    ::= { ntpSrvStatus 7 }

ntpSrvStatusDispersion OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The root dispersion of the running NTP instance."
    -- e.g. "6.927"
    DEFVAL { "n/a" }
    ::= { ntpSrvStatus 8 }

ntpSrvStatusServiceUptime OBJECT-TYPE
    SYNTAX      Unsigned32
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The uptime of the NTP service in seconds."
    -- time since ntpd was (re-)started (not sysUptime!)
    DEFVAL { 0 }
    ::= { ntpSrvStatus 9 }

ntpSrvStatusTime OBJECT-TYPE
    SYNTAX      OCTET STRING (SIZE (0 | 16))
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The current NTP time on the device, in 128-bit
         NTP date format. Ref: draft-ietf-ntp-ntpv4-proto-04,
         section 5:
          It includes a 64-bit signed seconds field



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          spanning 584 billion years and a 64-bit fraction
          field resolving .05 attosecond (i.e. 0.5e-18).
          For convenience in mapping between formats, the
          seconds field is divided into a 32-bit era field
          and a 32-bit timestamp field.

         If time is not syncronized this field shall be a
         zero-length string.

         This object can be used to timestamp events on this
         node and allow a management station to coorelate
         different time objects. For example, a management
         station could query this object and sysUpTime in
         the same operation to be able to relate sysUpTime
         to NTP time.

         This object is not to be used to set the time of
         the node querying this object. NTP should be used
         for this--or at least SNTP."
    ::= { ntpSrvStatus 10 }

-- ntpSrvStatusTimeVal OBJECT-TYPE
--     SYNTAX      Counter64
--     MAX-ACCESS  read-only
--     STATUS      current
--     DESCRIPTION
--         "The current NTP time on the device, in 64-bit
--          NTP time format. Ref: draft-ietf-ntp-ntpv4-proto-04,
--          section 5:
--           It includes a 32-bit unsigned seconds field spanning
--           136 years and a 32-bit fraction field resolving 232
--           picoseconds."
--     ::= { ntpSrvStatus 10 }
--
-- ntpSrvStatusEra OBJECT-TYPE
--     SYNTAX      Unsigned32
--     MAX-ACCESS  read-only
--     STATUS      current
--     DESCRIPTION
--         "The current Era."
--     ::= { ntpSrvStatus 11 }
--
-- ntpSrvStatusTimeDiscontinuityTimer OBJECT-TYPE
--     SYNTAX      TimeTicks
--     MAX-ACCESS  read-only
--     STATUS      current
--     DESCRIPTION
--         "The value of sysUpTime when a discontinuity event



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--          happened that affected the value of ntpSrvStatusTimeVal."
--     ::= { ntpSrvStatus 12 }
--
-- ntpSrvStatusTimeDiscontinuityOffset OBJECT-TYPE
--     SYNTAX      Integer32
--     MAX-ACCESS  read-only
--     STATUS      current
--     DESCRIPTION
--         "Latest time adjustment offset at the time of the last
--          discontinuity event for ntpSrvStatusTimeVal."
--     ::= { ntpSrvStatus 13 }


--
-- Section 3: The status of all currently mobilized associations
--

ntpAssociationTable OBJECT-TYPE
    SYNTAX           SEQUENCE OF NtpAssociationEntry
    MAX-ACCESS       not-accessible
    STATUS           current
    DESCRIPTION
        "The table of currently mobilized associations."
    ::= { ntpAssociation 1 }

ntpAssociationEntry OBJECT-TYPE
    SYNTAX      NtpAssociationEntry
    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
        "The table entry of currently mobilized associations."
    INDEX       { ntpAssocId }
    ::= { ntpAssociationTable 1 }

NtpAssociationEntry   ::= SEQUENCE {
        ntpAssocId                  Unsigned32,
        ntpAssocName                DisplayString,
        ntpAssocRefId               DisplayString,
        ntpAssocAddressType         InetAddressType,
        ntpAssocAddress             InetAddress,
        ntpAssocOffset              DisplayString,
        ntpAssocStatusJitter        DisplayString,
        ntpAssocStatusDelay         DisplayString,
        ntpAssocStatusDispersion    DisplayString
}

ntpAssocId      OBJECT-TYPE
    SYNTAX      Unsigned32 ( 1..99999 )



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    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
        "The association ID. This is an internal, unique ID."
    ::= { ntpAssociationEntry 1 }

ntpAssocName    OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The hostname or other descriptive name for the association."
    ::= { ntpAssociationEntry 2 }

ntpAssocRefId   OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The refclock driver ID, if available."
    -- a refclock driver ID like "127.127.1.0" for non uni/multi/broadcast
    -- associations
    ::= { ntpAssociationEntry 3 }

ntpAssocAddressType OBJECT-TYPE
    SYNTAX      InetAddressType
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The type of address of the association."
    -- contains the type of address for uni/multi/broadcast associations
    ::= { ntpAssociationEntry 4 }

ntpAssocAddress OBJECT-TYPE
    SYNTAX      InetAddress
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The IP address (IPv4 or IPv6) of the association."
    -- contains IP address of uni/multi/broadcast associations
    ::= { ntpAssociationEntry 5 }

ntpAssocOffset  OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The time offset to the association as a string."



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    -- including unit, e.g. "0.032 ms" or "1.232 s"
    ::= { ntpAssociationEntry 6 }

ntpAssocStatusJitter OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The jitter in miliseconds as a string."
    ::= { ntpAssociationEntry 7 }

ntpAssocStatusDelay OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The network delay in miliseconds as a string."
    ::= { ntpAssociationEntry 8 }

ntpAssocStatusDispersion OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The root dispersion of the association."
    -- e.g. "6.927"
    ::= { ntpAssociationEntry 9 }

--
-- Section 4: Control objects
--

ntpSrvHeartbeatInterval OBJECT-TYPE
    SYNTAX      Unsigned32
    MAX-ACCESS  read-write
    STATUS      current
    DESCRIPTION
        "The interval at which the ntpSrvNotifHeartbeat notification should be
         sent, in seconds. If set to 0 and the srvNotifHeartbeat bit in
         ntpSrvNotifBits is 1 then ntpSrvNotifHeartbeat is sent once."
    DEFVAL { 60 }
    ::= { ntpSrvControl 1 }

ntpSrvNotifBits OBJECT-TYPE
    SYNTAX       BITS {
                     notUsed(0), -- Used to sync up bit and notification
                                 -- indices
                     srvNotifNotSync(1),



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                     srvNotifServiceStarted(2),
                     srvNotifServiceStopped(3),
                     srvNotifStratumChange(4),
                     srvNotifSyspeerChanged(5),
                     srvNotifAddAssociation(6),
                     srvNotifRemoveAssociation(7),
                     srvNotifConfigChanged(8),
                     srvNotifLeapSecondAnnounced(9),
                     srvNotifHeartbeat(10)
    }
    MAX-ACCESS  read-write
    STATUS      current
    DESCRIPTION
        "A bit for each notification. A 1 for a particular bit enables
         that particular notification, a 0 disables it."
    ::= { ntpSrvControl 2 }

--
-- Section 5: Notification objects
--

ntpSrvNotifMessage OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  accessible-for-notify
    STATUS      current
    DESCRIPTION
        "Used as a payload object for all notifications. Holds a clear text
         event message."
    DEFVAL { "no event" }
    ::= { ntpSrvNotifObjects 1 }

--
-- Service SNMP notification definitions
--

ntpSrvNotifications OBJECT IDENTIFIER ::= { ntpSrvNotifPrefix 0 }

ntpSrvNotifNotInSync NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusCurrentStateVal }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when the NTP service transistions to
         not synchronised."
    ::= { ntpSrvNotifications 1 }

ntpSrvNotifServiceStarted NOTIFICATION-TYPE
    OBJECTS     { ntpSrvNotifMessage }
    STATUS      current



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    DESCRIPTION
        "The notification to be sent when NTP starts up."
    ::= { ntpSrvNotifications 2 }

ntpSrvNotifServiceStopped NOTIFICATION-TYPE
    OBJECTS     { ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when NTP stops."
    ::= { ntpSrvNotifications 3 }

ntpSrvNotifStratumChange NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusTime, ntpSrvStatusStratum,
                  ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when stratum level of NTP changes."
    ::= { ntpSrvNotifications 4 }

ntpSrvNotifSyspeerChanged NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusTime, ntpSrvStatusActiveRefSourceId,
                  ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when a (new) syspeer has been selected."
    ::= { ntpSrvNotifications 5 }

ntpSrvNotifAddAssociation NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusTime, ntpAssocName, ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when a new association is mobilized."
    ::= { ntpSrvNotifications 6 }

ntpSrvNotifRemoveAssociation NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusTime, ntpAssocName,  ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when an association is demobilized."
    ::= { ntpSrvNotifications 7 }

ntpSrvNotifConfigChanged NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusTime, ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when the NTP configuration has changed."
    -- e.g. when the system connected to the internet and was assigned
    -- a new IP address by the ISPs DHCP server



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    ::= { ntpSrvNotifications 8 }

ntpSrvNotifLeapSecondAnnounced NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusTime, ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent when a leap second has been announced."
    ::= { ntpSrvNotifications 9 }

ntpSrvNotifHeartbeat NOTIFICATION-TYPE
    OBJECTS     { ntpSrvStatusTime, ntpSrvStatusCurrentStateVal,
                  ntpSrvHeartbeatInterval, ntpSrvNotifMessage }
    STATUS      current
    DESCRIPTION
        "The notification to be sent periodically (as defined by
         ntpSrvHeartbeatInterval) to indicate that the NTP service is still
         alive."
    ::= { ntpSrvNotifications 10 }

--
-- Conformance/Compliance statements
--

ntpSrvConformance OBJECT IDENTIFIER ::= { ntpSnmpMIB 6 }

ntpSrvCompliances OBJECT IDENTIFIER ::= { ntpSrvConformance 1 }
ntpSrvGroups      OBJECT IDENTIFIER ::= { ntpSrvConformance 2 }

ntpSrvCompliance MODULE-COMPLIANCE
    STATUS      current
    DESCRIPTION
        "The compliance statement for SNMP entities which implement the NTP
         Service MIB"
    MODULE  -- this module
        MANDATORY-GROUPS {
                           ntpSrvObjectsGroup,
                           ntpSrvNotifPrefixGroup
        }
        ::= { ntpSrvCompliances 1 }

ntpSrvObjectsGroup OBJECT-GROUP
    OBJECTS {
              ntpSrvSoftwareName,
              ntpSrvSoftwareVersion,
              ntpSrvSoftwareVersionVal,
              ntpSrvSoftwareVendor,
              ntpSrvSystemType,
              ntpSrvTimeResolution,



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              ntpSrvTimeResolutionVal,
              ntpSrvTimePrecision,
              ntpSrvTimePrecisionVal,
              ntpSrvTimeDistance,
              ntpSrvStatusCurrentState,
              ntpSrvStatusCurrentStateVal,
              ntpSrvStatusStratum,
              ntpSrvStatusActiveRefSourceId,
              ntpSrvStatusActiveRefSourceName,
              ntpSrvStatusActiveOffset,
              ntpSrvStatusNumberOfRefSources,
              ntpSrvStatusDispersion,
              ntpSrvStatusServiceUptime,
              ntpSrvStatusTime,
              ntpAssocName,
              ntpAssocRefId,
              ntpAssocAddressType,
              ntpAssocAddress,
              ntpAssocOffset,
              ntpAssocStatusJitter,
              ntpAssocStatusDelay,
              ntpAssocStatusDispersion,
              ntpSrvHeartbeatInterval,
              ntpSrvNotifBits,
              ntpSrvNotifMessage
    }
    STATUS      current
    DESCRIPTION
        "The collection of objects for the NTP Service MIB"
    ::= { ntpSrvGroups 1 }

ntpSrvNotifPrefixGroup NOTIFICATION-GROUP
    NOTIFICATIONS {
                    ntpSrvNotifNotInSync,
                    ntpSrvNotifServiceStarted,
                    ntpSrvNotifServiceStopped,
                    ntpSrvNotifStratumChange,
                    ntpSrvNotifSyspeerChanged,
                    ntpSrvNotifAddAssociation,
                    ntpSrvNotifRemoveAssociation,
                    ntpSrvNotifConfigChanged,
                    ntpSrvNotifLeapSecondAnnounced,
                    ntpSrvNotifHeartbeat
    }
    STATUS      current
    DESCRIPTION
        "The collection of notifications for the NTP Service MIB"
    ::= { ntpSrvGroups 2 }



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END




5.  IANA Considerations

   The MIB module in this document uses the following IANA-assigned
   OBJECT IDENTIFIER values recorded in the SMI Numbers registry:

         Descriptor        OBJECT IDENTIFIER value
         ----------        -----------------------

         ntpSnmp           { mib-2 XXX }

   RFC Ed. : the IANA is requested to assign a value for "XXX" under the
   'mib-2' subtree and to record the assignment in the SMI Numbers
   registry.  When the assignment has been made, the RFC Editor is asked
   to replace "XXX" (here and in the MIB module) with the assigned value
   and to remove this note.


6.  Security Considerations

   All data objects in this MIB are read-only and therefore security is
   managed by the implementation of the SNMP agent providing the data
   objects in this MIB.  The general access management methods used for
   SNMP agents apply.


7.  References

7.1.  Normative References

   [1]  McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder,
        Ed., "Structure of Management Information Version 2 (SMIv2)",
        STD 58, RFC 2578, April 1999.

   [2]  McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder,
        Ed., "Textual Conventions for SMIv2", STD 58, RFC 2579,
        April 1999.

   [3]  McCloghrie, K., Perkins, D., and J. Schoenwaelder, "Conformance
        Statements for SMIv2", STD 58, RFC 2580, April 1999.







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7.2.  Informative References

   [4]  Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction
        and Applicability Statements for Internet-Standard Management
        Framework", RFC 3410, December 2002.


Author's Address

   Heiko Gerstung
   Meinberg Funkuhren Gmbh & Co. KG
   Auf der Landwehr 22
   Bad Pyrmont  31812
   Germany

   Phone: +49 5281 9309 25
   Email: heiko.gerstung@meinberg.de


































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Full Copyright Statement

   Copyright (C) The IETF Trust (2007).

   This document is subject to the rights, licenses and restrictions
   contained in BCP 78, and except as set forth therein, the authors
   retain all their rights.

   This document and the information contained herein are provided on an
   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND
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   WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.


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Acknowledgment

   Funding for the RFC Editor function is provided by the IETF
   Administrative Support Activity (IASA).





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