   -- Modified Hewlett-Packard 19 Aug 93
   -- Changed dot1dSrPortLargestFrame value dot1dSrMtu65535 from 65535 to 32000
   -- to overcome problem with 16 bit compiler

   RFC1286-MIB DEFINITIONS ::= BEGIN

   IMPORTS
           Counter, TimeTicks
                   FROM RFC1155-SMI
           mib-2
                   FROM RFC1213-MIB
           OBJECT-TYPE
                   FROM RFC-1212
           TRAP-TYPE
                   FROM RFC-1215;

   -- All representations of MAC addresses in this MIB Module use,
   -- as a textual convention (i.e. this convention does not affect
   -- their encoding), the data type:

   MacAddress ::= OCTET STRING (SIZE (6))    -- a 6 octet address in
                                             -- the "canonical" order
   -- defined by IEEE 802.1a, i.e., as if it were transmitted least
   -- significant bit first, even though 802.5 (in contrast to other
   -- 802.x protocols) requires MAC addresses to be transmitted most
   -- significant bit first.
   --
   -- 16-bit addresses, if needed, are represented by setting their
   -- upper 4 octets to all 0's, i.e., AAFF would be represented
   -- as 00000000AAFF.


   -- Similarly, all representations of Bridge-Id in this MIB Module
   -- use, as a textual convention (i.e. this convention does not affect
   -- their encoding), the data type:

   BridgeId ::= OCTET STRING (SIZE (8))   -- the Bridge-Identifier as
                                          -- used in the Spanning Tree

   -- Protocol to uniquely identify a bridge.  Its first two octets
   -- (in network byte order) contain a priority value and its last
   -- 6 octets contain the MAC address used to refer to a bridge in a
   -- unique fashion (typically, the numerically smallest MAC address
   -- of all ports on the bridge).
   -- Several objects in this MIB module represent values of timers
   -- used by the Spanning Tree Protocol.  In this MIB, these timers
   -- have values in units of hundreths of a second (i.e. 1/100 secs).
   -- These timers, when stored in a Spanning Tree Protocol's BPDU,
   -- are in units of 1/256 seconds.  Note, however, that 802.1d/D9
   -- specifies a settable granularity of no more than 1 second for
   -- these timers.  To avoid ambiguity, a data type is defined here
   -- as a textual convention and all representation of these timers
   -- in this MIB module are defined using this data type.  An algorithm
   -- is also defined for converting between the different units, to
   -- ensure a timer's value is not distorted by multiple conversions.
   -- The data type is:

   Timeout ::= INTEGER      -- a STP timer in units of 1/100 seconds

   -- To convert a Timeout value into a value in units of
   -- 1/256 seconds, the following algorithm should be used:
   --
   --      b  = floor( (n * 256) / 100)
   --
   -- where:
   --      floor   =  quotient [ignore remainder]
   --      n is the value in 1/100 second units
   --      b is the value in 1/256 second units
   --
   -- To convert the value from 1/256 second units back to
   -- 1/100 seconds, the following algorithm should be used:
   --
   --      n = ceiling( (b * 100) / 256)
   --
   -- where:
   --      ceiling =  quotient [if remainder is 0], or
   --                 quotient + 1 [if remainder is non-zero]
   --      n is the value in 1/100 second units
   --      b is the value in 1/256 second units
   --
   -- Note: it is important that the arithmetic operations are done
   -- in the order specified (i.e., multiply first, divide second).

   dot1dBridge   OBJECT IDENTIFIER ::= { mib-2 17 }

   -- groups in the Bridge MIB

   dot1dBase     OBJECT IDENTIFIER ::= { dot1dBridge 1 }

   dot1dStp      OBJECT IDENTIFIER ::= { dot1dBridge 2 }

   dot1dSr       OBJECT IDENTIFIER ::= { dot1dBridge 3 }

   dot1dTp       OBJECT IDENTIFIER ::= { dot1dBridge 4 }

   dot1dStatic   OBJECT IDENTIFIER ::= { dot1dBridge 5 }


   -- the dot1dBase group

   -- Implementation of the dot1dBase group is mandatory for all
   -- bridges.

   dot1dBaseBridgeAddress OBJECT-TYPE
       SYNTAX  MacAddress
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The MAC address used by this bridge when it must
               be referred to in a unique fashion.   It is
               recommended that this be the numerically smallest
               MAC address of all ports that belong to this
               bridge.  However it is only required to be unique.
               When concatenated with dot1dStpPriority a unique
               BridgeIdentifier is formed which is used in the
               Spanning Tree Protocol."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Sections 6.4.1.1.3 and 3.12.5"
       ::= { dot1dBase 1 }

   dot1dBaseNumPorts OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of ports controlled by this bridging
               entity."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.4.1.1.3"
       ::= { dot1dBase 2 }

   dot1dBaseType OBJECT-TYPE
       SYNTAX  INTEGER {
                   unknown(1),
                   transparent-only(2),
                   sourceroute-only(3),
                   srt(4)
               }
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "Indicates what type of bridging this bridge can
               perform.  If a bridge is actually performing a
               certain type of bridging this will be indicated by
               entries in the port table for the given type."
       ::= { dot1dBase 3 }

   -- The Generic Bridge Port Table

   dot1dBasePortTable OBJECT-TYPE
       SYNTAX  SEQUENCE OF Dot1dBasePortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A table that contains generic information about
               every port that is associated with this bridge.
               Transparent, source-route, and srt ports are
               included."
       ::= { dot1dBase 4 }

   dot1dBasePortEntry OBJECT-TYPE
       SYNTAX  Dot1dBasePortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A list of information for each port of the
               bridge."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.4.2, 6.6.1"
       INDEX  { dot1dBasePort }
       ::= { dot1dBasePortTable 1 }

   Dot1dBasePortEntry ::=
       SEQUENCE {
           dot1dBasePort
               INTEGER,
           dot1dBasePortIfIndex
               INTEGER,
           dot1dBasePortCircuit
               OBJECT IDENTIFIER,
           dot1dBasePortDelayExceededDiscards
               Counter,
           dot1dBasePortMtuExceededDiscards
               Counter
       }

   dot1dBasePort OBJECT-TYPE
       SYNTAX  INTEGER
       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 [4,6], 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
       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
                "P802.1d/D9, July 14, 1989: 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
               "P802.1d/D9, July 14, 1989: 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.  Transparent, Source Route, and SRT bridges will
   -- implement this group only if they 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."
       ::= { 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
               "P802.1d/D9, July 14, 1989: 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
               "P802.1d/D9, July 14, 1989: 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
               "P802.1d/D9, July 14, 1989: 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
               the Root Identifier parameter in all Configuration
               Bridge PDUs originated by this node."
       REFERENCE
               "P802.1d/D9, July 14, 1989: 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
               "P802.1d/D9, July 14, 1989: 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
               "P802.1d/D9, July 14, 1989: 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
               "P802.1d/D9, July 14, 1989: Section 4.5.3.4"
       ::= { dot1dStp 8 }

   dot1dStpHelloTime OBJECT-TYPE
       SYNTAX  Timeout
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "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
               "P802.1d/D9, July 14, 1989: 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
               "P802.1d/D9, July 14, 1989: 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 a particular state before moving to the
               next state.  For example, how long a port stays in
               the Listening state when moving from Blocking to
               Learning.  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
               "P802.1d/D9, July 14, 1989: Section 4.5.3.6"
       ::= { dot1dStp 11 }

   dot1dStpBridgeMaxAge OBJECT-TYPE
       SYNTAX  Timeout (600..4000)
       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/D9 specifies that the range for this
               parameter is related to the value of
               dot1dStpBridgeHelloTime. The granularity of this
               timer is specified by 802.1d/D9 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
               "P802.1d/D9, July 14, 1989: 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/D9 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
               "P802.1d/D9, July 14, 1989: Section 4.5.3.9"
       ::= { dot1dStp 13 }

   dot1dStpBridgeForwardDelay OBJECT-TYPE
       SYNTAX  Timeout (400..3000)
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The value that all bridges use for ForwardDelay
               when this bridge is acting as the root.  Note that
               802.1d/D9 specifies that the range for this
               parameter is related to the value of
               dot1dStpBridgeMaxAge.  The granularity of this
               timer is specified by 802.1d/D9 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
               "P802.1d/D9, July 14, 1989: Section 4.5.3.10"
       ::= { dot1dStp 14 }


   -- The Spanning Tree Port Table

   dot1dStpPortTable OBJECT-TYPE
       SYNTAX  SEQUENCE OF Dot1dStpPortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A table that contains port-specific information
               for the Spanning Tree Protocol."
       ::= { dot1dStp 15 }

   dot1dStpPortEntry OBJECT-TYPE
       SYNTAX  Dot1dStpPortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A list of information maintained by every port
               about the Spanning Tree Protocol state for that
               port."
       INDEX   { dot1dStpPort }
       ::= { dot1dStpPortTable 1 }

   Dot1dStpPortEntry ::=
       SEQUENCE {
           dot1dStpPort
               INTEGER,
           dot1dStpPortPriority
               INTEGER,
           dot1dStpPortState
               INTEGER,
           dot1dStpPortEnable
               INTEGER,
           dot1dStpPortPathCost
               INTEGER,
           dot1dStpPortDesignatedRoot
               BridgeId,
           dot1dStpPortDesignatedCost
               INTEGER,
           dot1dStpPortDesignatedBridge
               BridgeId,
           dot1dStpPortDesignatedPort
               OCTET STRING,
           dot1dStpPortForwardTransitions
               Counter
       }

   dot1dStpPort OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The port number of the port for which this entry
               contains Spanning Tree Protocol management
               information."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.8.2.1.2"
       ::= { dot1dStpPortEntry 1 }

   dot1dStpPortPriority OBJECT-TYPE
       SYNTAX  INTEGER (0..255)
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The value of the priority field which is
               contained in the first (in network byte order)
               octet of the (2 octet long) Port ID.  The other
               octet of the Port ID is given by the value of
               dot1dStpPort."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.1"
       ::= { dot1dStpPortEntry 2 }

   dot1dStpPortState OBJECT-TYPE
       SYNTAX  INTEGER {
                   disabled(1),
                   blocking(2),
                   listening(3),
                   learning(4),
                   forwarding(5),
                   broken(6)
               }
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The port's current state as defined by
               application of the Spanning Tree Protocol.  This
               state controls what action a port takes on
               reception of a frame.  If the bridge has detected
               a port that is malfunctioning it will place that
               port into the broken(6) state.  For ports which
               are disabled (see dot1dStpPortEnable), this object
               will have a value of disabled(1)."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.2"
       ::= { dot1dStpPortEntry 3 }

   dot1dStpPortEnable OBJECT-TYPE
       SYNTAX  INTEGER {
                   enabled(1),
                   disabled(2)
               }
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The enabled/disabled status of the port."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.2"
       ::= { dot1dStpPortEntry 4 }

   dot1dStpPortPathCost OBJECT-TYPE
       SYNTAX  INTEGER (1..65535)
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The contribution of this port to the path cost of
               paths towards the spanning tree root which include
               this port."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.3"
       ::= { dot1dStpPortEntry 5 }

   dot1dStpPortDesignatedRoot OBJECT-TYPE
       SYNTAX  BridgeId
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The unique Bridge Identifier of the Bridge
               recorded as the Root in the Configuration BPDUs
               transmitted by the Designated Bridge for the
               segment to which the port is attached."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.4"
       ::= { dot1dStpPortEntry 6 }

   dot1dStpPortDesignatedCost OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The path cost of the Designated Port of the
               segment connected to this port.  This value is
               compared to the Root Path Cost field in received
               bridge PDUs."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.5"
       ::= { dot1dStpPortEntry 7 }

   dot1dStpPortDesignatedBridge OBJECT-TYPE
       SYNTAX  BridgeId
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The Bridge Identifier of the bridge which this
               port considers to be the Designated Bridge for
               this port's segment."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.6"
       ::= { dot1dStpPortEntry 8 }

   dot1dStpPortDesignatedPort OBJECT-TYPE
       SYNTAX  OCTET STRING (SIZE (2))
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The Port Identifier of the port on the Designated
               Bridge for this port's segment."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 4.5.5.7"
       ::= { dot1dStpPortEntry 9 }

   dot1dStpPortForwardTransitions OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of times this port has transitioned
               from the Learning state to the Forwarding state."
       ::= { dot1dStpPortEntry 10 }


   -- the dot1dSr group

   -- Implementation of the dot1dSr group is optional.  It is
   -- implemented by those bridges that support the source route
   -- bridging mode, including Source Route and SRT bridges.

   dot1dSrPortTable OBJECT-TYPE
       SYNTAX  SEQUENCE OF Dot1dSrPortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A table that contains information about every
               port that is associated with this source route
               bridge."
       ::= { dot1dSr 1 }

   dot1dSrPortEntry OBJECT-TYPE
       SYNTAX  Dot1dSrPortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A list of information for each port of a source
               route bridge."
       INDEX   { dot1dSrPort }
       ::= { dot1dSrPortTable 1 }

   Dot1dSrPortEntry ::=
       SEQUENCE {
           dot1dSrPort
               INTEGER,
           dot1dSrPortHopCount
               INTEGER,
           dot1dSrPortLocalSegment
               INTEGER,
           dot1dSrPortBridgeNum
               INTEGER,
           dot1dSrPortTargetSegment
               INTEGER,
           dot1dSrPortLargestFrame
               INTEGER,
           dot1dSrPortSTESpanMode
               INTEGER,
           dot1dSrPortSpecInFrames
               Counter,
           dot1dSrPortSpecOutFrames
               Counter,
           dot1dSrPortApeInFrames
               Counter,
           dot1dSrPortApeOutFrames
               Counter,
           dot1dSrPortSteInFrames
               Counter,
           dot1dSrPortSteOutFrames
               Counter,
           dot1dSrPortSegmentMismatchDiscards
               Counter,
           dot1dSrPortDuplicateSegmentDiscards
               Counter,
           dot1dSrPortHopCountExceededDiscards
               Counter
       }

   dot1dSrPort OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The port number of the port for which this entry
               contains Source Route management information."
       ::= { dot1dSrPortEntry 1 }

   dot1dSrPortHopCount OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The maximum number of routing descriptors allowed
               in an All Paths or Spanning Tree Explorer frames."
       ::= { dot1dSrPortEntry 2 }

   dot1dSrPortLocalSegment OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The segment number that uniquely identifies the
               segment to which this port is connected. Current
               source routing protocols limit this value to the
               range: 0 through 4095. A value of 65535 signifies
               that no segment number is assigned to this port."
       ::= { dot1dSrPortEntry 3 }

   dot1dSrPortBridgeNum OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "A bridge number uniquely identifies a bridge when
               more than one bridge is used to span the same two
               segments.  Current source routing protocols limit
               this value to the range: 0 through 15. A value of
               65535 signifies that no bridge number is assigned
               to this bridge."
       ::= { dot1dSrPortEntry 4 }

   dot1dSrPortTargetSegment OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The segment number that corresponds to the target
               segment this port is considered to be connected to
               by the bridge.  Current source routing protocols
               limit this value to the range: 0 through 4095. A
               value of 65535 signifies that no target segment is
               assigned to this port."
       ::= { dot1dSrPortEntry 5 }

   -- It would be nice if we could use ifMtu as the size of the
   -- largest frame, but we can't because ifMtu is defined to be
   -- the size that the (inter-)network layer can use which can
   -- differ from the MAC layer (especially if several layers of
   -- encapsulation are used).

   dot1dSrPortLargestFrame OBJECT-TYPE
       SYNTAX  INTEGER {
                   dot1dSrMtu516   (516),
                   dot1dSrMtu1500  (1500),
                   dot1dSrMtu2052  (2052),
                   dot1dSrMtu4472  (4472),
                   dot1dSrMtu8144  (8144),
                   dot1dSrMtu11407 (11407), -- yes this is correct don't
                   dot1dSrMtu17800 (17800), -- ask me where it came from.
                   dot1dSrMtu65535 (32000)  -- Should be (65535) - HP
               }

       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The maximum size of the INFO field (LLC and
               above) that this port can send/receive.  It does
               not include any MAC level (framing) octets.  The
               value of this object is used by this bridge to
               determine whether a modification of the
               LargestFrame (LF, see [14]) field of the Routing
               Control field of the Routing Information Field is
               necessary.  Valid values as defined by the 802.5
               source routing bridging specification[14] are 516,
               1500, 2052, 4472, 8144, 11407, 17800, and 65535
               octets.  Behavior of the port when an illegal
               value is written is implementation specific.  It
               is recommended that a reasonable legal value be
               chosen."
       ::= { dot1dSrPortEntry 6 }

   dot1dSrPortSTESpanMode OBJECT-TYPE
       SYNTAX  INTEGER {
                   auto-span(1),
                   disabled(2),
                   forced(3)
               }
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "Determines how this port behaves when presented
               with a Spanning Tree Explorer frame.  The value
               'disabled(2)' indicates that the port will not
               accept or send Spanning Tree Explorer packets; any
               STE packets received will be silently discarded.
               The value 'forced(3)' indicates the port will
               always accept and propagate Spanning Tree Explorer
               frames.  This allows a manually configured
               Spanning Tree for this class of packet to be
               configured.  Note that unlike transparent bridging
               this is not catastrophic to the network if there
               are loops.  The value 'auto-span(1)' can only be
               returned by a bridge that both implements the
               Spanning Tree Protocol and has use of the protocol
               enabled on this port. The behavior of the port for
               Spanning Tree Explorer frames is determined by the
               state of dot1dStpPortState.  If the port is in the
               'forwarding' state, the frame will be accepted or
               propagated.  Otherwise it will be silently
               discarded."
       ::= { dot1dSrPortEntry 7 }

   dot1dSrPortSpecInFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of specifically routed frames that
               have been received from this port's segment."
       ::= { dot1dSrPortEntry 8 }

   dot1dSrPortSpecOutFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of specifically routed frames that
               this port has transmitted on its segment."
       ::= { dot1dSrPortEntry 9 }

   dot1dSrPortApeInFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of all paths explorer frames that have
               been received by this port from its segment."
       ::= { dot1dSrPortEntry 10 }

   dot1dSrPortApeOutFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of all paths explorer frames that have
               been transmitted by this port on its segment."
       ::= { dot1dSrPortEntry 11 }

   dot1dSrPortSteInFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of spanning tree explorer frames that
               have been received by this port from its segment."
       ::= { dot1dSrPortEntry 12 }

   dot1dSrPortSteOutFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of spanning tree explorer frames that
               have been transmitted by this port on its
               segment."
       ::= { dot1dSrPortEntry 13 }

   dot1dSrPortSegmentMismatchDiscards OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of explorer frames that have been
               discarded by this port because the routing
               descriptor field contained an invalid adjacent
               segment value."
       ::= { dot1dSrPortEntry 14 }

   dot1dSrPortDuplicateSegmentDiscards OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of frames that have been discarded by
               this port because the routing descriptor field
               contained a duplicate segment identifier."
       ::= { dot1dSrPortEntry 15 }

   dot1dSrPortHopCountExceededDiscards OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of explorer frames that have been
               discarded by this port because the Routing
               Information Field has exceeded the maximum route
               descriptor length."
       ::= { dot1dSrPortEntry 16 }


   -- the dot1dTp group

   -- Implementation of the dot1dTp group is optional.  It is
   -- implemented by those bridges that support the transparent
   -- bridging mode.  A transparent or SRT bridge will implement
   -- this group.


   dot1dTpLearnedEntryDiscards OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The total number of Forwarding Database entries,
               which have been or would have been learnt, but
               have been discarded due to a lack of space to
               store them in the Forwarding Database.  If this
               counter is increasing, it indicates that the
               Forwarding Database is regularly becoming full (a
               condition which has unpleasant performance effects
               on the subnetwork).  If this counter has a
               significant value but is not presently increasing,
               it indicates that the problem has been occurring
               but is not persistent."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.7.1.1.3"
       ::= { dot1dTp 1 }

   dot1dTpAgingTime OBJECT-TYPE
       SYNTAX   INTEGER
       ACCESS   read-write
       STATUS   mandatory
       DESCRIPTION
               "The timeout period in seconds for aging out
               dynamically learned forwarding information."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.7.1.1.3"
       ::= { dot1dTp 2 }


   --  The Forwarding Database for Transparent Bridges

   dot1dTpFdbTable OBJECT-TYPE
       SYNTAX  SEQUENCE OF Dot1dTpFdbEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A table that contains information about unicast
               entries for which the bridge has forwarding and/or
               filtering information.  This information is used
               by the transparent bridging function in
               determining how to propagate a received frame."
       ::= { dot1dTp 3 }

   dot1dTpFdbEntry OBJECT-TYPE
       SYNTAX  Dot1dTpFdbEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "Information about a specific unicast MAC address
               for which the bridge has some forwarding and/or
               filtering information."
       INDEX   { dot1dTpFdbAddress }
       ::= { dot1dTpFdbTable 1 }

   Dot1dTpFdbEntry ::=
       SEQUENCE {
           dot1dTpFdbAddress
               MacAddress,
           dot1dTpFdbPort
               INTEGER,
           dot1dTpFdbStatus
               INTEGER
       }

   dot1dTpFdbAddress OBJECT-TYPE
       SYNTAX  MacAddress
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "A unicast MAC address for which the bridge has
               forwarding and/or filtering information."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 3.9.1, 3.9.2"
       ::= { dot1dTpFdbEntry 1 }

   dot1dTpFdbPort OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "Either the value '0', or the port number of the
               port on which a frame having a source address
               equal to the value of the corresponding instance
               of dot1dTpFdbAddress has been seen.  A value of
               '0' indicates that the port number has not been
               learned but that the bridge does have some
               forwarding/filtering information about this
               address (e.g. in the dot1dStaticTable).
               Implementors are encouraged to assign the port
               value to this object whenever it is learned even
               for addresses for which the corresponding value of
               dot1dTpFdbStatus is not learned(3)."

       ::= { dot1dTpFdbEntry 2 }

   dot1dTpFdbStatus OBJECT-TYPE
       SYNTAX  INTEGER {
                   other(1),
                   invalid(2),
                   learned(3),
                   self(4),
                   mgmt(5)
               }
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The status of this entry.  The meanings of the
               values are:

                 other(1)   : none of the following.  This would
                              include the case where some other
                              MIB object (not the corresponding
                              instance of dot1dTpFdbPort, nor an
                              entry in the dot1dStaticTable) is
                              being used to determine if and how
                              frames addressed to the value of
                              the corresponding instance of
                              dot1dTpFdbAddress are being
                              forwarded.

                 invalid(2) : this entry is not longer valid
                              (e.g., it was learned but has since
                              aged-out), but has not yet been
                              flushed from the table.

                 learned(3) : the value of the corresponding
                              instance of dot1dTpFdbPort was
                              learned, and is being used.

                 self(4)    : the value of the corresponding
                              instance of dot1dTpFdbAddress
                              represents one of the bridge's
                              addresses.  The corresponding
                              instance of dot1dTpFdbPort
                              indicates which of the bridge's
                              ports has this address.

                 mgmt(5)    : the value of the corresponding
                              instance of dot1dTpFdbAddress is
                              also the value of an existing
                              instance of dot1dStaticAddress."
       ::= { dot1dTpFdbEntry 3 }


   --  Port Table for Transparent Bridges

   dot1dTpPortTable OBJECT-TYPE
       SYNTAX  SEQUENCE OF Dot1dTpPortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A table that contains information about every
               port that is associated with this transparent
               bridge."
       ::= { dot1dTp 4 }

   dot1dTpPortEntry OBJECT-TYPE
       SYNTAX  Dot1dTpPortEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A list of information for each port of a
               transparent bridge."
       INDEX   { dot1dTpPort }
       ::= { dot1dTpPortTable 1 }

   Dot1dTpPortEntry ::=
       SEQUENCE {
           dot1dTpPort
               INTEGER,
           dot1dTpPortMaxInfo
               INTEGER,
           dot1dTpPortInFrames
               Counter,
           dot1dTpPortOutFrames
               Counter,
           dot1dTpPortInDiscards
               Counter
       }

   dot1dTpPort OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The port number of the port for which this entry
               contains Transparent bridging management
               information."
       ::= { dot1dTpPortEntry 1 }

   -- It would be nice if we could use ifMtu as the size of the
   -- largest INFO field, but we can't because ifMtu is defined
   -- to be the size that the (inter-)network layer can use which
   -- can differ from the MAC layer (especially if several layers
   -- of encapsulation are used).

   dot1dTpPortMaxInfo OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The maximum size of the INFO (non-MAC) field that
               this port will receive or transmit."
       ::= { dot1dTpPortEntry 2 }

   dot1dTpPortInFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of frames that have been received by
               this port from its segment. Note that a frame
               received on the interface corresponding to this
               port is only counted by this object if and only if
               it is for a protocol being processed by the local
               bridging function."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.6.1.1.3"
       ::= { dot1dTpPortEntry 3 }

   dot1dTpPortOutFrames OBJECT-TYPE
       SYNTAX  Counter
       ACCESS  read-only
       STATUS  mandatory
       DESCRIPTION
               "The number of frames that have been transmitted
               by this port to its segment.  Note that a frame
               transmitted on the interface corresponding to this
               port is only counted by this object if and only if
               it is for a protocol being processed by the local
               bridging function."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.6.1.1.3"
       ::= { dot1dTpPortEntry 4 }

   dot1dTpPortInDiscards OBJECT-TYPE
       SYNTAX   Counter
       ACCESS   read-only
       STATUS   mandatory
       DESCRIPTION
               "Count of valid frames received which were
               discarded (i.e., filtered) by the Forwarding
               Process."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.6.1.1.3"
       ::= { dot1dTpPortEntry 5 }


   -- The Static (Destination-Address Filtering) Database

   -- Implementation of this group is optional.


   dot1dStaticTable OBJECT-TYPE
       SYNTAX  SEQUENCE OF Dot1dStaticEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "A table containing filtering information
               configured into the bridge by (local or network)
               management specifying the set of ports to which
               frames received from specific ports and containing
               specific destination addresses are allowed to be
               forwarded.  The value of zero in this table as the
               port number from which frames with a specific
               destination address are received, is used to
               specify all ports for which there is no specific
               entry in this table for that particular
               destination address.  Entries are valid for
               unicast and for group/broadcast addresses."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 6.7.2"
       ::= { dot1dStatic 1 }

   dot1dStaticEntry OBJECT-TYPE
       SYNTAX  Dot1dStaticEntry
       ACCESS  not-accessible
       STATUS  mandatory
       DESCRIPTION
               "Filtering information configured into the bridge
               by (local or network) management specifying the
               set of ports to which frames received from a
               specific port and containing a specific
               destination address are allowed to be forwarded."
       REFERENCE
               "P802.1d/D9, July 14,1989: Section 6.7.2"
       INDEX   { dot1dStaticAddress, dot1dStaticReceivePort }
       ::= { dot1dStaticTable 1 }

   Dot1dStaticEntry ::=
       SEQUENCE {
           dot1dStaticAddress
               MacAddress,
           dot1dStaticReceivePort
               INTEGER,
           dot1dStaticAllowedToGoTo
               OCTET STRING,
           dot1dStaticStatus
               INTEGER
       }

   dot1dStaticAddress OBJECT-TYPE
       SYNTAX  MacAddress
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The destination MAC address in a frame to which
               this entry's filtering information applies.  This
               object can take the value of a unicast address, a
               group address or the broadcast address."
       REFERENCE
               "P802.1d/D9, July 14, 1989: Section 3.9.1, 3.9.2"
       ::= { dot1dStaticEntry 1 }

   dot1dStaticReceivePort OBJECT-TYPE
       SYNTAX  INTEGER
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "Either the value '0', or the port number of the
               port from which a frame must be received in order
               for this entry's filtering information to apply.
               A value of zero indicates that this entry applies
               on all ports of the bridge for which there is no
               other applicable entry."
       ::= { dot1dStaticEntry 2 }

   dot1dStaticAllowedToGoTo OBJECT-TYPE
       SYNTAX  OCTET STRING
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "The set of ports to which frames received from a
               specific port and destined for a specific MAC
               address, are allowed to be forwarded.  Each octet
               within the value of this object specifies a set of
               eight ports, with the first octet specifying ports
               1 through 8, the second octet specifying ports 9
               through 16, etc.  Within each octet, the most
               significant bit represents the lowest numbered
               port, and the least significant bit represents the
               highest numbered port.  Thus, each port of the
               bridge is represented by a single bit within the
               value of this object.  If that bit has a value of
               '1' then that port is included in the set of
               ports; the port is not included if its bit has a
               value of '0'.  (Note that the setting of the bit
               corresponding to the port from which a frame is
               received is irrelevant.)"
       ::= { dot1dStaticEntry 3 }

   dot1dStaticStatus OBJECT-TYPE
       SYNTAX  INTEGER {
                   other(1),
                   invalid(2),
                   permanent(3),
                   deleteOnReset(4),
                   deleteOnTimeout(5)
               }
       ACCESS  read-write
       STATUS  mandatory
       DESCRIPTION
               "This object indicates the status of this entry.
                    other(1) - this entry is currently in use but
                         the conditions under which it will
                         remain so are different from each of the
                         following values.
                    invalid(2) - writing this value to the object
                         removes the corresponding entry.
                    permanent(3) - this entry is currently in use
                         and will remain so after the next reset
                         of the bridge.
                    deleteOnReset(4) - this entry is currently in
                         use and will remain so until the next
                         reset of the bridge.
                    deleteOnTimeout(5) - this entry is currently
                         in use and will remain so until it is
                         aged out."
       ::= { dot1dStaticEntry 4 }

   -- Traps for use by Bridges

   -- Traps for the Spanning Tree Protocol

   newRoot TRAP-TYPE
       ENTERPRISE  dot1dBridge
       DESCRIPTION
               "The newRoot trap indicates that the sending agent
               has become the new root of the Spanning Tree; the
               trap is sent by a bridge soon after its election
               as the new root, e.g., upon expiration of the
               Topology Change Timer immediately subsequent to
               its election."
       ::= 1

   topologyChange TRAP-TYPE
       ENTERPRISE  dot1dBridge
       DESCRIPTION
               "A topologyChange trap is sent by a bridge when
               any of its configured ports transitions from the
               Learning state to the Forwarding state, or from
               the Forwarding state to the Blocking state.  The
               trap is not sent if a newRoot trap is sent for the
               same transition."
       ::= 2

   END
