The MPLS WG Archive

[Cheenu Srinivasan <csrinivasan@tachion.com>]

Title: Consensus for draft-kompella-mpls-te-mib-00.txt

MPLS/TE WG members,

        This message is in response to the recent introduction
of the draft entitled, "draft-kompella-mpls-te-mib-00.txt" to
the TE WG and the debate which followed. Since no consensus could
be reached in the TE WG as to whether or not to adopt this draft,
the TE WG chair felt that this work was still important, and as such
has directed the author of this draft and the authors of the
MPLS-TE-MIB to work out a consensus for folding-in the salient
portions of the draft into the MPLS-TE-MIB. We have done so, and
below you will find the fruits of our labor. We will wait for the
feedback of the working groups before posting a revised version of
MPLS-TE-MIB incorporating these changes.

        Tom Nadeau
        Kireeti Kompella
        Cheenu Srinivasan
        Arun Vishwanathan

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        1. Two scalars to indicate the number of configured and
           active tunnels: mplsConfiguredTunnels and mplsActiveTunnels. An
           "active" tunnel denotes an mplsTunnelEntry with
           mplsTunnelOperStatus = Up. A "configured" tunnel denotes an
           mplsTunnelEntry whose mplsTunnelRowStatus is "active".

        2. The addition of a new performance table which AUGMENTS
           the mpslTunnelTable which includes the following
           attributes:

        mplsTunnelPerfPackets OBJECT-TYPE
        SYNTAX     Counter32
                                  
        mplsTunnelHCPerfPackets OBJECT-TYPE
        SYNTAX     Counter64
                                  
        mplsTunnelErrors OBJECT-TYPE
        SYNTAX  Counter32

        mplsTunnelPerfBytes OBJECT-TYPE
        SYNTAX     Counter32
                                  
        mplsTunnelHCPerfBytes OBJECT-TYPE
        SYNTAX     Counter64
                                  
        3. The following objects will be added to the tunnelTable
           to allow for further monitoring of the state
           of the tunnel once it is configured.

                mplsTunnelPrimaryTimeUp    TimeStamp,
                mplsTunnelPathChanges      Counter32,
                mplsTunnelLastPathChange   TimeStamp,
                mplsTunnelCreationTime     TimeStamp,
                mplsTunnelStateTransitions Unsigned32,
                mplsTunnelEgressLSRId      Unsigned32,

        A path change is when the current active path (over which
        packets are being forwarded) changes to another path.

        4. The addition of a new table called mplsTunnelCHopTable
           which lists the computed HOPs for a tunnel path.

        5. We will enhance the mplsTunnelHopStrictOrLoose object
           to change its name to mplsTunnelHopType. This object
           will become an enumeration of { strict, loose }.

        6.  A new bit will be added to the mplsTunnelSessionAttribute
            called ComputePath. This bit instructs the LSR to
            use Constraint-based Routing to compute the actual path to
            be traversed by this tunnel instance.

        7. Resource class affinity attributes associated with a traffic
           tunnel can be used to specify the class of resources which are
           to be explicitly included or excluded from the path of the traffic
           trunk. These are policy attributes which can be used to impose
           additional constraints on the path traversed by a given traffic
           trunk.

        Three new objects shall be added to the tunnelEntry:
                               
        mplsTunnelIncludeAnyAffinity OBJECT-TYPE
        SYNTAX          Integer32
        MAX-ACCESS      not-accessible
        STATUS          current
        DESCRIPTION
          "A link satisfies the include-any constraint iff  the constraint is zero,
           or the link and the constraint have a resource class in common."
        REFERENCE "See section section 5.6.3 of RFC 2702."
        
        mplsTunnelIncludeAllAffinity OBJECT-TYPE
        SYNTAX          Integer32
        MAX-ACCESS    not-accessible
        STATUS        current
        DESCRIPTION
          "A link satisfies the include-all constraint if and only if the link
           contains all of the administrative groups specified in the constraint."
        REFERENCE "RFC 2702, section 5.6.3."

        mplsTunnelExcludeAllAffinity OBJECT-TYPE
        SYNTAX          Integer32
        MAX-ACCESS    not-accessible
        STATUS          current
        DESCRIPTION
          "A link satisfies the exclude constraint if and only if the
          link contains none of the administrative groups specified in
          the constraint."
        REFERENCE "RFC 2702, section 5.6.3."

        8. A scalar which will denote which type(s) of TE distribution protocol(s)
           is(are) in use by the LSR.

        mplsTunnelTEDistProto OBJECT-TYPE
        SYNTAX      BITS { other (0), ospf(1), isis (2) }
        MAX-ACCESS    not-accessible
        STATUS        current
        DESCRIPTION
          "The traffic engineering distribution protocol(s) used by this LSR. Note that
           an LSR may support more than one distribution protocol simultaneously."

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