   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,
       mldInterfaceQueryMaxRespDelay     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 }

   mldInterfaceQueryMaxRespDelay 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,
                 mldInterfaceQueryMaxRespDelay,
                 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

