rfc1493.txt

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                      "IEEE 802.1D-1990: Section 6.4.2, 6.6.1"
              INDEX  { dot1dBasePort }
              ::= { dot1dBasePortTable 1 }


          Dot1dBasePortEntry ::=
              SEQUENCE {
                  dot1dBasePort
                      INTEGER,
                  dot1dBasePortIfIndex
                      INTEGER,
                  dot1dBasePortCircuit



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RFC 1493                       Bridge MIB                      July 1993


                      OBJECT IDENTIFIER,
                  dot1dBasePortDelayExceededDiscards
                      Counter,
                  dot1dBasePortMtuExceededDiscards
                      Counter
              }

          dot1dBasePort OBJECT-TYPE
              SYNTAX  INTEGER (1..65535)
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The port number of the port for which this entry
                      contains bridge management information."
              ::= { dot1dBasePortEntry 1 }

          dot1dBasePortIfIndex OBJECT-TYPE
              SYNTAX  INTEGER
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The value of the instance of the ifIndex object,
                      defined in MIB-II, for the interface corresponding
                      to this port."
              ::= { dot1dBasePortEntry 2 }

          dot1dBasePortCircuit OBJECT-TYPE
              SYNTAX  OBJECT IDENTIFIER
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "For a port which (potentially) has the same value
                      of dot1dBasePortIfIndex as another port on the
                      same bridge, this object contains the name of an
                      object instance unique to this port.  For example,
                      in the case where multiple ports correspond one-
                      to-one with multiple X.25 virtual circuits, this
                      value might identify an (e.g., the first) object
                      instance associated with the X.25 virtual circuit
                      corresponding to this port.

                      For a port which has a unique value of
                      dot1dBasePortIfIndex, this object can have the
                      value { 0 0 }."
              ::= { dot1dBasePortEntry 3 }

          dot1dBasePortDelayExceededDiscards OBJECT-TYPE
              SYNTAX  Counter



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              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The number of frames discarded by this port due
                      to excessive transit delay through the bridge.  It
                      is incremented by both transparent and source
                      route bridges."
              REFERENCE
                       "IEEE 802.1D-1990: Section 6.6.1.1.3"
              ::= { dot1dBasePortEntry 4 }

          dot1dBasePortMtuExceededDiscards OBJECT-TYPE
              SYNTAX  Counter
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The number of frames discarded by this port due
                      to an excessive size.  It is incremented by both
                      transparent and source route bridges."
              REFERENCE
                      "IEEE 802.1D-1990: Section 6.6.1.1.3"
              ::= { dot1dBasePortEntry 5 }


          -- the dot1dStp group

          -- Implementation of the dot1dStp group is optional.  It is
          -- implemented by those bridges that support the Spanning Tree
          -- Protocol.


          dot1dStpProtocolSpecification OBJECT-TYPE
              SYNTAX  INTEGER {
                          unknown(1),
                          decLb100(2),
                          ieee8021d(3)
                      }
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "An indication of what version of the Spanning
                      Tree Protocol is being run.  The value
                      'decLb100(2)' indicates the DEC LANbridge 100
                      Spanning Tree protocol.  IEEE 802.1d
                      implementations will return 'ieee8021d(3)'.  If
                      future versions of the IEEE Spanning Tree Protocol
                      are released that are incompatible with the
                      current version a new value will be defined."



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              ::= { dot1dStp 1 }

          dot1dStpPriority OBJECT-TYPE
              SYNTAX  INTEGER (0..65535)
              ACCESS  read-write
              STATUS  mandatory
              DESCRIPTION
                      "The value of the write-able portion of the Bridge
                      ID, i.e., the first two octets of the (8 octet
                      long) Bridge ID.  The other (last) 6 octets of the
                      Bridge ID are given by the value of
                      dot1dBaseBridgeAddress."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.7"
              ::= { dot1dStp 2 }

          dot1dStpTimeSinceTopologyChange OBJECT-TYPE
              SYNTAX  TimeTicks
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The time (in hundredths of a second) since the
                      last time a topology change was detected by the
                      bridge entity."
              REFERENCE
                      "IEEE 802.1D-1990: Section 6.8.1.1.3"
              ::= { dot1dStp 3 }

          dot1dStpTopChanges OBJECT-TYPE
              SYNTAX  Counter
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The total number of topology changes detected by
                      this bridge since the management entity was last
                      reset or initialized."
              REFERENCE
                      "IEEE 802.1D-1990: Section 6.8.1.1.3"
              ::= { dot1dStp 4 }

          dot1dStpDesignatedRoot OBJECT-TYPE
              SYNTAX  BridgeId
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The bridge identifier of the root of the spanning
                      tree as determined by the Spanning Tree Protocol
                      as executed by this node.  This value is used as



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                      the Root Identifier parameter in all Configuration
                      Bridge PDUs originated by this node."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.1"
              ::= { dot1dStp 5 }

          dot1dStpRootCost OBJECT-TYPE
              SYNTAX  INTEGER
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The cost of the path to the root as seen from
                      this bridge."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.2"
              ::= { dot1dStp 6 }

          dot1dStpRootPort OBJECT-TYPE
              SYNTAX  INTEGER
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The port number of the port which offers the
                      lowest cost path from this bridge to the root
                      bridge."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.3"
              ::= { dot1dStp 7 }

          dot1dStpMaxAge OBJECT-TYPE
              SYNTAX  Timeout
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The maximum age of Spanning Tree Protocol
                      information learned from the network on any port
                      before it is discarded, in units of hundredths of
                      a second.  This is the actual value that this
                      bridge is currently using."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.4"
              ::= { dot1dStp 8 }

          dot1dStpHelloTime OBJECT-TYPE
              SYNTAX  Timeout
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION



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                      "The amount of time between the transmission of
                      Configuration bridge PDUs by this node on any port
                      when it is the root of the spanning tree or trying
                      to become so, in units of hundredths of a second.
                      This is the actual value that this bridge is
                      currently using."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.5"
              ::= { dot1dStp 9 }

          dot1dStpHoldTime OBJECT-TYPE
              SYNTAX  INTEGER
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "This time value determines the interval length
                      during which no more than two Configuration bridge
                      PDUs shall be transmitted by this node, in units
                      of hundredths of a second."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.14"
              ::= { dot1dStp 10 }

          dot1dStpForwardDelay OBJECT-TYPE
              SYNTAX  Timeout
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "This time value, measured in units of hundredths
                      of a second, controls how fast a port changes its
                      spanning state when moving towards the Forwarding
                      state.  The value determines how long the port
                      stays in each of the Listening and Learning
                      states, which precede the Forwarding state.  This
                      value is also used, when a topology change has
                      been detected and is underway, to age all dynamic
                      entries in the Forwarding Database.  [Note that
                      this value is the one that this bridge is
                      currently using, in contrast to
                      dot1dStpBridgeForwardDelay which is the value that
                      this bridge and all others would start using
                      if/when this bridge were to become the root.]"
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.6"
              ::= { dot1dStp 11 }

          dot1dStpBridgeMaxAge OBJECT-TYPE
              SYNTAX  Timeout (600..4000)



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              ACCESS  read-write
              STATUS  mandatory
              DESCRIPTION
                      "The value that all bridges use for MaxAge when
                      this bridge is acting as the root.  Note that
                      802.1D-1990 specifies that the range for this
                      parameter is related to the value of
                      dot1dStpBridgeHelloTime. The granularity of this
                      timer is specified by 802.1D-1990 to be 1 second.
                      An agent may return a badValue error if a set is
                      attempted to a value which is not a whole number
                      of seconds."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.8"
              ::= { dot1dStp 12 }

          dot1dStpBridgeHelloTime OBJECT-TYPE
              SYNTAX  Timeout (100..1000)
              ACCESS  read-write
              STATUS  mandatory
              DESCRIPTION
                      "The value that all bridges use for HelloTime when
                      this bridge is acting as the root.  The
                      granularity of this timer is specified by 802.1D-
                      1990 to be 1 second.  An agent may return a
                      badValue error if a set is attempted to a value
                      which is not a whole number of seconds."
              REFERENCE
                      "IEEE 802.1D-1990: Section 4.5.3.9"