IPV6-MLD-MIB device MIB details by RFC

IPV6-MLD-MIB file content

The SNMP protocol is used to for conveying information and commands between agents and managing entities. SNMP uses the User Datagram Protocol (UDP) as the transport protocol for passing data between managers and agents. The reasons for using UDP for SNMP are, firstly it has low overheads in comparison to TCP, which uses a 3-way hand shake for connection. Secondly, in congested networks, SNMP over TCP is a bad idea because TCP in order to maintain reliability will flood the network with retransmissions.

Management information (MIB) is represented as a collection of managed objects. These objects together form a virtual information base called MIB. An agent may implement many MIBs, but all agents must implement a particular MIB called MIB-II [16]. This standard defines variables for things such as interface statistics (interface speeds, MTU, octets sent, octets received, etc.) as well as various other things pertaining to the system itself (system location, system contact, etc.). The main goal of MIB-II is to provide general TCP/IP management information.

Use ActiveXperts Network Monitor 2024 to import vendor-specific MIB files, inclusing IPV6-MLD-MIB.

Vendor:	RFC
Mib:	IPV6-MLD-MIB  [download]  [view objects]
Tool:	ActiveXperts Network Monitor 2024 [download]    (ships with advanced SNMP/MIB tools)

-- WinAgents MIB Extraction Wizard
-- Extracted from rfc3019.txt 16.03.2005 20:21:54

IPV6-MLD-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE, Counter32, Gauge32,
    Unsigned32, TimeTicks, mib-2     FROM SNMPv2-SMI
    RowStatus, TruthValue            FROM SNMPv2-TC
    InetAddressIPv6             FROM INET-ADDRESS-MIB
    InterfaceIndex, InterfaceIndexOrZero
                                         FROM IF-MIB
    MODULE-COMPLIANCE, OBJECT-GROUP  FROM SNMPv2-CONF;


mldMIB MODULE-IDENTITY
    LAST-UPDATED "200101250000Z" -- 25 Jan 2001
    ORGANIZATION "IETF IPNGWG Working Group."
    CONTACT-INFO
            " Brian Haberman
              Nortel Networks
              4309 Emperor Blvd.
              Durham, NC  27703
              USA

              Phone: +1 919 992 4439
              e-mail: haberman@nortelnetworks.com"
    DESCRIPTION
            "The MIB module for MLD Management."
    REVISION "200101250000Z" -- 25 Jan 2001
    DESCRIPTION
            "Initial version, published as RFC 3019."
    ::= { mib-2 91 }


mldMIBObjects     OBJECT IDENTIFIER ::= { mldMIB 1 }
--
--  The MLD Interface Table
--

mldInterfaceTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF MldInterfaceEntry

    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
             "The (conceptual) table listing the interfaces on which
             MLD is enabled."
    ::= { mldMIBObjects 1 }

mldInterfaceEntry OBJECT-TYPE
    SYNTAX     MldInterfaceEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) representing an interface on
            which MLD is enabled."
    INDEX      { mldInterfaceIfIndex }
    ::= { mldInterfaceTable 1 }

MldInterfaceEntry ::= SEQUENCE {
    mldInterfaceIfIndex               InterfaceIndex,
    mldInterfaceQueryInterval         Unsigned32,
    mldInterfaceStatus                RowStatus,
    mldInterfaceVersion               Unsigned32,
    mldInterfaceQuerier               InetAddressIPv6,
    mldInterfaceQueryMaxResponseDelay Unsigned32,
    mldInterfaceJoins                 Counter32,
    mldInterfaceGroups                Gauge32,
    mldInterfaceRobustness            Unsigned32,
    mldInterfaceLastListenQueryIntvl  Unsigned32,
    mldInterfaceProxyIfIndex          InterfaceIndexOrZero,
    mldInterfaceQuerierUpTime         TimeTicks,
    mldInterfaceQuerierExpiryTime     TimeTicks
}

mldInterfaceIfIndex OBJECT-TYPE

    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The internetwork-layer interface value of the interface
            for which MLD is enabled."
    ::= { mldInterfaceEntry 1 }

mldInterfaceQueryInterval OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "seconds"
    MAX-ACCESS read-create
    STATUS     current

    DESCRIPTION
            "The frequency at which MLD Host-Query packets are
            transmitted on this interface."
    DEFVAL     { 125 }
    ::= { mldInterfaceEntry 2 }

mldInterfaceStatus OBJECT-TYPE
    SYNTAX     RowStatus
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
             "The activation of a row enables MLD on the interface.
             The destruction of a row disables MLD on the interface."
    ::= { mldInterfaceEntry 3 }

mldInterfaceVersion OBJECT-TYPE
    SYNTAX     Unsigned32
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
             "The version of MLD which is running on this interface.
             This object is a place holder to allow for new versions
             of MLD to be introduced.  Version 1 of MLD is defined
             in RFC 2710."
    DEFVAL     { 1 }
    ::= { mldInterfaceEntry 4 }

mldInterfaceQuerier OBJECT-TYPE
    SYNTAX     InetAddressIPv6 (SIZE (16))
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
             "The address of the MLD Querier on the IPv6 subnet to
             which this interface is attached."
    ::= { mldInterfaceEntry 5 }

mldInterfaceQueryMaxResponseDelay OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "seconds"
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
            "The maximum query response time advertised in MLD
            queries on this interface."
    DEFVAL     { 10 }
    ::= { mldInterfaceEntry 6 }

mldInterfaceJoins OBJECT-TYPE

    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of times a group membership has been added on
            this interface; that is, the number of times an entry for
            this interface has been added to the Cache Table.  This
            object gives an indication of the amount of MLD activity
            over time."
    ::= { mldInterfaceEntry 7 }

mldInterfaceGroups OBJECT-TYPE
    SYNTAX     Gauge32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The current number of entries for this interface in the
            Cache Table."
    ::= { mldInterfaceEntry 8 }

mldInterfaceRobustness OBJECT-TYPE
    SYNTAX     Unsigned32
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
            "The Robustness Variable allows tuning for the expected
            packet loss on a subnet.  If a subnet is expected to be
            lossy, the Robustness Variable may be increased.  MLD is
            robust to (Robustness Variable-1) packet losses.  The
            discussion of the Robustness Variable is in Section 7.1
            of RFC 2710."
    DEFVAL     { 2 }
    ::= { mldInterfaceEntry 9 }

mldInterfaceLastListenQueryIntvl OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "seconds"
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
             "The Last Member Query Interval is the Max Response
             Delay inserted into Group-Specific Queries sent in
             response to Leave Group messages, and is also the amount
             of time between Group-Specific Query messages.  This
             value may be tuned to modify the leave latency of the
             network.  A reduced value results in reduced time to
             detect the loss of the last member of a group."
    DEFVAL     { 1 }

    ::= { mldInterfaceEntry 10 }

mldInterfaceProxyIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndexOrZero
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
             "Some devices implement a form of MLD proxying whereby
             memberships learned on the interface represented by this
             row, cause MLD Multicast Listener Reports to be sent on
             the internetwork-layer interface identified by this
             object.  Such a device would implement mldRouterMIBGroup
             only on its router interfaces (those interfaces with
             non-zero mldInterfaceProxyIfIndex).  Typically, the
             value of this object is 0, indicating that no proxying
             is being done."
    DEFVAL     { 0 }
    ::= { mldInterfaceEntry 11 }

mldInterfaceQuerierUpTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The time since mldInterfaceQuerier was last changed."
    ::= { mldInterfaceEntry 12 }

mldInterfaceQuerierExpiryTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The time remaining before the Other Querier Present
            Timer expires.  If the local system is the querier,
            the value of this object is zero."
    ::= { mldInterfaceEntry 13 }


--
--  The MLD Cache Table
--

mldCacheTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF MldCacheEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
             "The (conceptual) table listing the IPv6 multicast

             groups for which there are members on a particular
             interface."
    ::= { mldMIBObjects 2 }

mldCacheEntry OBJECT-TYPE
    SYNTAX     MldCacheEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) in the mldCacheTable."
    INDEX      { mldCacheAddress, mldCacheIfIndex }
    ::= { mldCacheTable 1 }

MldCacheEntry ::= SEQUENCE {
    mldCacheAddress         InetAddressIPv6,
    mldCacheIfIndex            InterfaceIndex,
    mldCacheSelf               TruthValue,
    mldCacheLastReporter   InetAddressIPv6,
    mldCacheUpTime             TimeTicks,
    mldCacheExpiryTime         TimeTicks,
    mldCacheStatus             RowStatus
}

mldCacheAddress OBJECT-TYPE
    SYNTAX     InetAddressIPv6 (SIZE (16))
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The IPv6 multicast group address for which this entry
            contains information."
    ::= { mldCacheEntry 1 }

mldCacheIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
             "The internetwork-layer interface for which this entry
             contains information for an IPv6 multicast group
             address."
    ::= { mldCacheEntry 2 }

mldCacheSelf OBJECT-TYPE
    SYNTAX     TruthValue
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
            "An indication of whether the local system is a member of

            this group address on this interface."
    DEFVAL     { true }
    ::= { mldCacheEntry 3 }

mldCacheLastReporter OBJECT-TYPE
    SYNTAX     InetAddressIPv6 (SIZE (16))
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
             "The IPv6 address of the source of the last membership
             report received for this IPv6 Multicast group address on
             this interface.  If no membership report has been
             received, this object has the value 0::0."
    ::= { mldCacheEntry 4 }

mldCacheUpTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The time elapsed since this entry was created."
    ::= { mldCacheEntry 5 }

mldCacheExpiryTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
             "The minimum amount of time remaining before this entry
             will be aged out.  A value of 0 indicates that the entry
             is only present because mldCacheSelf is true and that if
             the router left the group, this entry would be aged out
             immediately.  Note that some implementations may process
             Membership Reports from the local system in the same way
             as reports from other hosts, so a value of 0 is not
             required."
    ::= { mldCacheEntry 6 }

mldCacheStatus OBJECT-TYPE
    SYNTAX     RowStatus
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
            "The status of this row, by which new entries may be
            created, or existing entries deleted from this table."
    ::= { mldCacheEntry 7 }



-- conformance information

mldMIBConformance
               OBJECT IDENTIFIER ::= { mldMIB 2 }
mldMIBCompliances
               OBJECT IDENTIFIER ::= { mldMIBConformance 1 }
mldMIBGroups
               OBJECT IDENTIFIER ::= { mldMIBConformance 2 }


-- compliance statements

mldHostMIBCompliance MODULE-COMPLIANCE
    STATUS  current
    DESCRIPTION
            "The compliance statement for hosts running MLD and
            implementing the MLD MIB."
    MODULE  -- this module
    MANDATORY-GROUPS { mldBaseMIBGroup,
                       mldHostMIBGroup
                     }

    OBJECT     mldInterfaceStatus
    MIN-ACCESS read-only
    DESCRIPTION
             "Write access is not required."

    ::= { mldMIBCompliances 1 }

mldRouterMIBCompliance MODULE-COMPLIANCE
    STATUS  current
    DESCRIPTION
            "The compliance statement for routers running MLD and
            implementing the MLD MIB."
    MODULE  -- this module
    MANDATORY-GROUPS { mldBaseMIBGroup,
                       mldRouterMIBGroup
                     }

    OBJECT     mldInterfaceStatus
    MIN-ACCESS read-only
    DESCRIPTION
             "Write access is not required."

    ::= { mldMIBCompliances 2 }


-- units of conformance


mldBaseMIBGroup OBJECT-GROUP
    OBJECTS { mldCacheSelf,
              mldCacheStatus, mldInterfaceStatus
            }
    STATUS  current
    DESCRIPTION
            "The basic collection of objects providing management of
            MLD.  The mldBaseMIBGroup is designed to allow for the
            manager creation and deletion of MLD cache entries."
    ::= { mldMIBGroups 1 }

mldRouterMIBGroup OBJECT-GROUP
    OBJECTS { mldCacheUpTime, mldCacheExpiryTime,
              mldInterfaceQueryInterval,
              mldInterfaceJoins, mldInterfaceGroups,
              mldCacheLastReporter,
              mldInterfaceQuerierUpTime,
              mldInterfaceQuerierExpiryTime,
              mldInterfaceQuerier,
              mldInterfaceVersion,
              mldInterfaceQueryMaxResponseDelay,
              mldInterfaceRobustness,
              mldInterfaceLastListenQueryIntvl
            }
    STATUS  current
    DESCRIPTION
            "A collection of additional objects for management of MLD
            in routers."
    ::= { mldMIBGroups 2 }


mldHostMIBGroup OBJECT-GROUP
    OBJECTS { mldInterfaceQuerier
            }
    STATUS  current
    DESCRIPTION
            "A collection of additional objects for management of MLD
            in hosts."
    ::= { mldMIBGroups 3 }


mldProxyMIBGroup OBJECT-GROUP
    OBJECTS { mldInterfaceProxyIfIndex }
    STATUS  current
    DESCRIPTION
            "A collection of additional objects for management of MLD
            proxy devices."

    ::= { mldMIBGroups 4 }

END