BRIDGE-MIB DEFINITIONS ::= BEGIN

-- ---------------------------------------------------------- --

-- MIB for IEEE 802.1D devices

-- ---------------------------------------------------------- --

IMPORTS

    MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,

    Counter32, Integer32, TimeTicks, mib-2

        FROM SNMPv2-SMI

    TEXTUAL-CONVENTION, MacAddress

        FROM SNMPv2-TC

    MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP

        FROM SNMPv2-CONF

    InterfaceIndex FROM IF-MIB

    ;

dot1dBridge MODULE-IDENTITY

    LAST-UPDATED "200509190000Z"

    ORGANIZATION "IETF Bridge MIB Working Group"

    CONTACT-INFO

        "Email: bridge-mib@ietf.org

                 K.C. Norseth (Editor)

                 L-3 Communications

            Tel: +1 801-594-2809

          Email: kenyon.c.norseth@L-3com.com

         Postal: 640 N. 2200 West.

                 Salt Lake City, Utah 84116-0850

                 Les Bell (Editor)

                 3Com Europe Limited

          Phone: +44 1442 438025

          Email: elbell@ntlworld.com

         Postal: 3Com Centre, Boundary Way

                 Hemel Hempstead

                 Herts.  HP2 7YU

                 UK

         Send comments to <bridge-mib@ietf.org>"

    DESCRIPTION

        "The Bridge MIB module for managing devices that support

        IEEE 802.1D.

        Copyright (C) The Internet Society (2005).  This version of

        this MIB module is part of RFC 4188; see the RFC itself for

        full legal notices."

    REVISION     "200509190000Z"

    DESCRIPTION

         "Third revision, published as part of RFC 4188.

         The MIB module has been converted to SMIv2 format.

         Conformance statements have been added and some

         description and reference clauses have been updated.

         The object dot1dStpPortPathCost32 was added to

         support IEEE 802.1t and the permissible values of

         dot1dStpPriority and dot1dStpPortPriority have been

         clarified for bridges supporting IEEE 802.1t or

         IEEE 802.1w.

         The interpretation of dot1dStpTimeSinceTopologyChange

         has been clarified for bridges supporting the Rapid

         Spanning Tree Protocol (RSTP)."

    REVISION     "199307310000Z"

    DESCRIPTION

         "Second revision, published as part of RFC 1493."

    REVISION     "199112310000Z"

    DESCRIPTION

         "Initial revision, published as part of RFC 1286."

    ::= { mib-2 17 }

-- ---------------------------------------------------------- --

-- Textual Conventions

-- ---------------------------------------------------------- --

BridgeId ::= TEXTUAL-CONVENTION

    STATUS      current

    DESCRIPTION

        "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)."

    SYNTAX      OCTET STRING (SIZE (8))

Timeout ::= TEXTUAL-CONVENTION

    DISPLAY-HINT "d"

    STATUS      current

    DESCRIPTION

        "A Spanning Tree Protocol (STP) timer in units of 1/100

        seconds.  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

        hundredths 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-1998 specifies a settable granularity of no more

        than one second for these timers.  To avoid ambiguity,

        a conversion algorithm is defined below for converting

        between the different units, which ensures a timer's

        value is not distorted by multiple conversions.

        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 nonzero]

            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)."

    SYNTAX      Integer32

-- ---------------------------------------------------------- --

-- subtrees in the Bridge MIB

-- ---------------------------------------------------------- --

dot1dNotifications  OBJECT IDENTIFIER ::= { dot1dBridge 0 }

dot1dBase           OBJECT IDENTIFIER ::= { dot1dBridge 1 }

dot1dStp            OBJECT IDENTIFIER ::= { dot1dBridge 2 }

dot1dSr             OBJECT IDENTIFIER ::= { dot1dBridge 3 }

-- documented in RFC 1525

dot1dTp             OBJECT IDENTIFIER ::= { dot1dBridge 4 }

dot1dStatic         OBJECT IDENTIFIER ::= { dot1dBridge 5 }

-- Subtrees used by Bridge MIB Extensions:

--      pBridgeMIB  MODULE-IDENTITY   ::= { dot1dBridge 6 }

--      qBridgeMIB  MODULE-IDENTITY   ::= { dot1dBridge 7 }

-- Note that the practice of registering related MIB modules

-- below dot1dBridge has been discouraged since there is no

-- robust mechanism to track such registrations.

dot1dConformance    OBJECT IDENTIFIER ::= { dot1dBridge 8 }

-- ---------------------------------------------------------- --

-- the dot1dBase subtree

-- ---------------------------------------------------------- --

-- Implementation of the dot1dBase subtree is mandatory for all

-- bridges.

-- ---------------------------------------------------------- --

dot1dBaseBridgeAddress OBJECT-TYPE

    SYNTAX      MacAddress

    MAX-ACCESS  read-only

    STATUS      current

    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

        "IEEE 802.1D-1998: clauses 14.4.1.1.3 and 7.12.5"

    ::= { dot1dBase 1 }

dot1dBaseNumPorts OBJECT-TYPE

    SYNTAX      Integer32

    UNITS       "ports"

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of ports controlled by this bridging

        entity."

    REFERENCE

        "IEEE 802.1D-1998: clause 14.4.1.1.3"

    ::= { dot1dBase 2 }

dot1dBaseType OBJECT-TYPE

    SYNTAX      INTEGER {

                    unknown(1),

                    transparent-only(2),

                    sourceroute-only(3),

                    srt(4)

                }

    MAX-ACCESS  read-only

    STATUS      current

    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

    MAX-ACCESS  not-accessible

    STATUS      current

    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

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "A list of information for each port of the bridge."

    REFERENCE

        "IEEE 802.1D-1998: clause 14.4.2, 14.6.1"

    INDEX  { dot1dBasePort }

    ::= { dot1dBasePortTable 1 }

Dot1dBasePortEntry ::=

    SEQUENCE {

        dot1dBasePort

            Integer32,

        dot1dBasePortIfIndex

            InterfaceIndex,

        dot1dBasePortCircuit

            OBJECT IDENTIFIER,

        dot1dBasePortDelayExceededDiscards

            Counter32,

        dot1dBasePortMtuExceededDiscards

            Counter32

    }

dot1dBasePort OBJECT-TYPE

    SYNTAX      Integer32 (1..65535)

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The port number of the port for which this entry

        contains bridge management information."

    ::= { dot1dBasePortEntry 1 }

dot1dBasePortIfIndex OBJECT-TYPE

    SYNTAX      InterfaceIndex

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The value of the instance of the ifIndex object,

        defined in IF-MIB, for the interface corresponding

        to this port."

    ::= { dot1dBasePortEntry 2 }

dot1dBasePortCircuit OBJECT-TYPE

    SYNTAX      OBJECT IDENTIFIER

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "For a port that (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      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    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-1998: clause 14.6.1.1.3"

    ::= { dot1dBasePortEntry 4 }

dot1dBasePortMtuExceededDiscards OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    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-1998: clause 14.6.1.1.3"

    ::= { dot1dBasePortEntry 5 }

-- ---------------------------------------------------------- --

-- the dot1dStp subtree

-- ---------------------------------------------------------- --

-- Implementation of the dot1dStp subtree 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)

                }

    MAX-ACCESS  read-only

    STATUS      current

    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

        that are incompatible with the current version

        are released a new value will be defined."

    ::= { dot1dStp 1 }

dot1dStpPriority OBJECT-TYPE

    SYNTAX      Integer32 (0..65535)

    MAX-ACCESS  read-write

    STATUS      current

    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.

        On bridges supporting IEEE 802.1t or IEEE 802.1w,

        permissible values are 0-61440, in steps of 4096."

    REFERENCE

        "IEEE 802.1D-1998 clause 8.10.2, Table 8-4,

        IEEE 802.1t clause 8.10.2, Table 8-4, clause 14.3."

    ::= { dot1dStp 2 }

dot1dStpTimeSinceTopologyChange OBJECT-TYPE

    SYNTAX      TimeTicks

    UNITS       "centi-seconds"

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The time (in hundredths of a second) since the

        last time a topology change was detected by the

        bridge entity.

        For RSTP, this reports the time since the tcWhile

        timer for any port on this Bridge was nonzero."

    REFERENCE

        "IEEE 802.1D-1998 clause 14.8.1.1.,

        IEEE 802.1w clause 14.8.1.1."

    ::= { dot1dStp 3 }

dot1dStpTopChanges OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The total number of topology changes detected by

        this bridge since the management entity was last

        reset or initialized."

    REFERENCE

        "IEEE 802.1D-1998 clause 14.8.1.1."

    ::= { dot1dStp 4 }

dot1dStpDesignatedRoot OBJECT-TYPE

    SYNTAX      BridgeId

    MAX-ACCESS  read-only

    STATUS      current

    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

        "IEEE 802.1D-1998: clause 8.5.3.1"

    ::= { dot1dStp 5 }

dot1dStpRootCost OBJECT-TYPE

    SYNTAX      Integer32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The cost of the path to the root as seen from

        this bridge."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.3.2"

    ::= { dot1dStp 6 }

dot1dStpRootPort OBJECT-TYPE

    SYNTAX      Integer32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The port number of the port that offers the lowest

        cost path from this bridge to the root bridge."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.3.3"

    ::= { dot1dStp 7 }

dot1dStpMaxAge OBJECT-TYPE

    SYNTAX      Timeout

    UNITS       "centi-seconds"

    MAX-ACCESS  read-only

    STATUS      current

    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-1998: clause 8.5.3.4"

    ::= { dot1dStp 8 }

dot1dStpHelloTime OBJECT-TYPE

    SYNTAX      Timeout

    UNITS       "centi-seconds"

    MAX-ACCESS  read-only

    STATUS      current

    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

        "IEEE 802.1D-1998: clause 8.5.3.5"

    ::= { dot1dStp 9 }

dot1dStpHoldTime OBJECT-TYPE

    SYNTAX      Integer32

    UNITS       "centi-seconds"

    MAX-ACCESS  read-only

    STATUS      current

    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-1998: clause 8.5.3.14"

    ::= { dot1dStp 10 }

dot1dStpForwardDelay OBJECT-TYPE

    SYNTAX      Timeout

    UNITS       "centi-seconds"

    MAX-ACCESS  read-only

    STATUS      current

    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-1998: clause 8.5.3.6"

    ::= { dot1dStp 11 }

dot1dStpBridgeMaxAge OBJECT-TYPE

    SYNTAX      Timeout (600..4000)

    UNITS       "centi-seconds"

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The value that all bridges use for MaxAge when this

        bridge is acting as the root.  Note that 802.1D-1998

        specifies that the range for this parameter is related

        to the value of dot1dStpBridgeHelloTime.  The

        granularity of this timer is specified by 802.1D-1998 to

        be 1 second.  An agent may return a badValue error if a

        set is attempted to a value that is not a whole number

        of seconds."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.3.8"

    ::= { dot1dStp 12 }

dot1dStpBridgeHelloTime OBJECT-TYPE

    SYNTAX      Timeout (100..1000)

    UNITS       "centi-seconds"

    MAX-ACCESS  read-write

    STATUS      current

    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-1998 to be 1 second.  An

        agent may return a badValue error if a set is attempted

        to a value that is not a whole number of seconds."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.3.9"

    ::= { dot1dStp 13 }

dot1dStpBridgeForwardDelay OBJECT-TYPE

    SYNTAX      Timeout (400..3000)

    UNITS       "centi-seconds"

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The value that all bridges use for ForwardDelay when

        this bridge is acting as the root.  Note that

        802.1D-1998 specifies that the range for this parameter

        is related to the value of dot1dStpBridgeMaxAge.  The

        granularity of this timer is specified by 802.1D-1998 to

        be 1 second.  An agent may return a badValue error if a

        set is attempted to a value that is not a whole number

        of seconds."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.3.10"

    ::= { dot1dStp 14 }

-- ---------------------------------------------------------- --

-- The Spanning Tree Port Table

-- ---------------------------------------------------------- --

dot1dStpPortTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF Dot1dStpPortEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "A table that contains port-specific information

        for the Spanning Tree Protocol."

    ::= { dot1dStp 15 }

dot1dStpPortEntry OBJECT-TYPE

    SYNTAX      Dot1dStpPortEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    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

            Integer32,

        dot1dStpPortPriority

            Integer32,

        dot1dStpPortState

            INTEGER,

        dot1dStpPortEnable

            INTEGER,

        dot1dStpPortPathCost

            Integer32,

        dot1dStpPortDesignatedRoot

            BridgeId,

        dot1dStpPortDesignatedCost

            Integer32,

        dot1dStpPortDesignatedBridge

            BridgeId,

        dot1dStpPortDesignatedPort

            OCTET STRING,

        dot1dStpPortForwardTransitions

            Counter32,

        dot1dStpPortPathCost32

            Integer32

    }

dot1dStpPort OBJECT-TYPE

    SYNTAX      Integer32 (1..65535)

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The port number of the port for which this entry

        contains Spanning Tree Protocol management information."

    REFERENCE

        "IEEE 802.1D-1998: clause 14.8.2.1.2"

    ::= { dot1dStpPortEntry 1 }

dot1dStpPortPriority OBJECT-TYPE

    SYNTAX      Integer32 (0..255)

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The value of the priority field that 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.

        On bridges supporting IEEE 802.1t or IEEE 802.1w,

        permissible values are 0-240, in steps of 16."

    REFERENCE

        "IEEE 802.1D-1998 clause 8.10.2, Table 8-4,

        IEEE 802.1t clause 8.10.2, Table 8-4, clause 14.3."

    ::= { dot1dStpPortEntry 2 }

dot1dStpPortState OBJECT-TYPE

    SYNTAX      INTEGER {

                    disabled(1),

                    blocking(2),

                    listening(3),

                    learning(4),

                    forwarding(5),

                    broken(6)

                }

    MAX-ACCESS  read-only

    STATUS      current

    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 that are disabled (see dot1dStpPortEnable), this

        object will have a value of disabled(1)."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.5.2"

    ::= { dot1dStpPortEntry 3 }

dot1dStpPortEnable OBJECT-TYPE

    SYNTAX      INTEGER {

                    enabled(1),

                    disabled(2)

                }

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The enabled/disabled status of the port."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.5.2"

    ::= { dot1dStpPortEntry 4 }

dot1dStpPortPathCost OBJECT-TYPE

    SYNTAX      Integer32 (1..65535)

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The contribution of this port to the path cost of

        paths towards the spanning tree root which include

        this port.  802.1D-1998 recommends that the default

        value of this parameter be in inverse proportion to

        the speed of the attached LAN.

        New implementations should support dot1dStpPortPathCost32.

        If the port path costs exceeds the maximum value of this

        object then this object should report the maximum value,

        namely 65535.  Applications should try to read the

        dot1dStpPortPathCost32 object if this object reports

        the maximum value."

    REFERENCE "IEEE 802.1D-1998: clause 8.5.5.3"

        ::= { dot1dStpPortEntry 5 }

dot1dStpPortDesignatedRoot OBJECT-TYPE

    SYNTAX      BridgeId

    MAX-ACCESS  read-only

    STATUS      current

    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

        "IEEE 802.1D-1998: clause 8.5.5.4"

    ::= { dot1dStpPortEntry 6 }

dot1dStpPortDesignatedCost OBJECT-TYPE

    SYNTAX      Integer32

    MAX-ACCESS  read-only

    STATUS      current

    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

        "IEEE 802.1D-1998: clause 8.5.5.5"

    ::= { dot1dStpPortEntry 7 }

dot1dStpPortDesignatedBridge OBJECT-TYPE

    SYNTAX      BridgeId

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The Bridge Identifier of the bridge that this

        port considers to be the Designated Bridge for

        this port's segment."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.5.6"

    ::= { dot1dStpPortEntry 8 }

dot1dStpPortDesignatedPort OBJECT-TYPE

    SYNTAX      OCTET STRING (SIZE (2))

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The Port Identifier of the port on the Designated

        Bridge for this port's segment."

    REFERENCE

        "IEEE 802.1D-1998: clause 8.5.5.7"

    ::= { dot1dStpPortEntry 9 }

dot1dStpPortForwardTransitions OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of times this port has transitioned

        from the Learning state to the Forwarding state."

    ::= { dot1dStpPortEntry 10 }

dot1dStpPortPathCost32 OBJECT-TYPE

    SYNTAX      Integer32 (1..200000000)

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The contribution of this port to the path cost of

        paths towards the spanning tree root which include

        this port.  802.1D-1998 recommends that the default

        value of this parameter be in inverse proportion to

        the speed of the attached LAN.

        This object replaces dot1dStpPortPathCost to support

        IEEE 802.1t."

    REFERENCE

        "IEEE 802.1t clause 8.10.2, Table 8-5."

    ::= { dot1dStpPortEntry 11 }

-- ---------------------------------------------------------- --

-- the dot1dTp subtree

-- ---------------------------------------------------------- --

-- Implementation of the dot1dTp subtree is optional.  It is

-- implemented by those bridges that support the transparent

-- bridging mode.  A transparent or SRT bridge will implement

-- this subtree.

-- ---------------------------------------------------------- --

dot1dTpLearnedEntryDiscards OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The total number of Forwarding Database entries that

        have been or would have been learned, but have been

        discarded due to a lack of storage space in the

        Forwarding Database.  If this counter is increasing, it

        indicates that the Forwarding Database is regularly

        becoming full (a condition that 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

        "IEEE 802.1D-1998: clause 14.7.1.1.3"

    ::= { dot1dTp 1 }

dot1dTpAgingTime OBJECT-TYPE

    SYNTAX      Integer32 (10..1000000)

    UNITS       "seconds"

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The timeout period in seconds for aging out

        dynamically-learned forwarding information.

        802.1D-1998 recommends a default of 300 seconds."

    REFERENCE

        "IEEE 802.1D-1998: clause 14.7.1.1.3"

    ::= { dot1dTp 2 }

-- ---------------------------------------------------------- --

--  The Forwarding Database for Transparent Bridges

-- ---------------------------------------------------------- --

dot1dTpFdbTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF Dot1dTpFdbEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    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

    MAX-ACCESS  not-accessible

    STATUS      current

    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

            Integer32,

        dot1dTpFdbStatus

            INTEGER

    }

dot1dTpFdbAddress OBJECT-TYPE

    SYNTAX      MacAddress

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "A unicast MAC address for which the bridge has

        forwarding and/or filtering information."

    REFERENCE

        "IEEE 802.1D-1998: clause 7.9.1, 7.9.2"

    ::= { dot1dTpFdbEntry 1 }

dot1dTpFdbPort OBJECT-TYPE

    SYNTAX      Integer32

    MAX-ACCESS  read-only

    STATUS      current

    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)

                }

    MAX-ACCESS  read-only

    STATUS      current

    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 no 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.