RFC 1525 (rfc1525) - Page 3 of 18

Definitions of Managed Objects for Source Routing Bridges

RFC 1525               Source Routing Bridge MIB          September 1993


   layer.  There are two major modes defined for this bridging;
   transparent and source route.  The transparent method of bridging is
   defined in the IEEE 802.1d MAC Bridge specification [11].  Source
   route bridging has been defined by I.B.M. and is described in the
   Token Ring Architecture Reference [12], as well as the IEEE 802.5M
   SRT Bridge Operations Addendum [14] to 802.1d.  This memo defines
   objects needed for management of a source routing bridge, and is an
   extension to the SNMP Bridge MIB [6].

   An explicit attempt was made to keep this MIB as simple as possible.
   This was accomplished by applying the following criteria to objects
   proposed for inclusion:

      (1)  Start with a small set of essential objects and add only
           as further objects are needed.

      (2)  Require objects be essential for either fault or
           configuration management.

      (3)  Consider evidence of current use and/or utility.

      (4)  Limit the total of objects.

      (5)  Exclude objects which are simply derivable from others in
           this or other MIBs.

      (6)  Avoid causing critical sections to be heavily
           instrumented.  The guideline that was followed is one
           counter per critical section per layer.

3.1.  Structure of MIB

   Objects in this MIB are arranged into groups.  Each group is
   organized as a set of related objects.  The overall structure and
   assignment of objects to their groups is shown below.  Where
   appropriate, the corresponding management object name found in IEEE
   802.1d [11] and IEEE 802.5M [14] is also included.

    SR Bridge MIB Name              IEEE Name

      dot1dSr
        PortTable
          Port
          HopCount                    SourceRoutingPort
                                        .PortHopCount
          LocalSegment                  .SegmentNumber
          BridgeNum                     .BridgeNumber
          TargetSegment



Decker, McCloghrie, Langille & Rijsinghani