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.
        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
MAX-ACCESS  not-accessible
STATUS      current
DESCRIPTION
    "A table that contains information about every port that
    is associated with this transparent bridge."
::= { dot1dTp 4 }

dot1dTpPortEntry OBJECT-TYPE

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

Dot1dTpPortEntry ::=

SEQUENCE {
    dot1dTpPort
        Integer32,
    dot1dTpPortMaxInfo
        Integer32,
    dot1dTpPortInFrames
        Counter32,
    dot1dTpPortOutFrames
        Counter32,
    dot1dTpPortInDiscards
        Counter32
}

dot1dTpPort OBJECT-TYPE

SYNTAX      Integer32 (1..65535)
MAX-ACCESS  read-only
STATUS      current
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      Integer32
UNITS       "bytes"
MAX-ACCESS  read-only
STATUS      current
DESCRIPTION
    "The maximum size of the INFO (non-MAC) field that

    this port will receive or transmit."
::= { dot1dTpPortEntry 2 }

dot1dTpPortInFrames OBJECT-TYPE

SYNTAX      Counter32
UNITS       "frames"
MAX-ACCESS  read-only
STATUS      current
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, including
    bridge management frames."
REFERENCE
    "IEEE 802.1D-1998: clause 14.6.1.1.3"
::= { dot1dTpPortEntry 3 }

dot1dTpPortOutFrames OBJECT-TYPE

SYNTAX      Counter32
UNITS       "frames"
MAX-ACCESS  read-only
STATUS      current
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, including
    bridge management frames."
REFERENCE
    "IEEE 802.1D-1998: clause 14.6.1.1.3"
::= { dot1dTpPortEntry 4 }

dot1dTpPortInDiscards OBJECT-TYPE

SYNTAX      Counter32
UNITS       "frames"
MAX-ACCESS  read-only
STATUS      current
DESCRIPTION
    "Count of received valid frames that were discarded
    (i.e., filtered) by the Forwarding Process."
REFERENCE
    "IEEE 802.1D-1998: clause 14.6.1.1.3"
::= { dot1dTpPortEntry 5 }

– ———————————————————- –

– The Static (Destination-Address Filtering) Database – ———————————————————- – – Implementation of this subtree is optional. – ———————————————————- –

dot1dStaticTable OBJECT-TYPE

SYNTAX      SEQUENCE OF Dot1dStaticEntry
MAX-ACCESS  not-accessible
STATUS      current
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
    "IEEE 802.1D-1998: clause 14.7.2"
::= { dot1dStatic 1 }

dot1dStaticEntry OBJECT-TYPE

SYNTAX      Dot1dStaticEntry
MAX-ACCESS  not-accessible
STATUS      current
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
    "IEEE 802.1D-1998: clause 14.7.2"
INDEX   { dot1dStaticAddress, dot1dStaticReceivePort }
::= { dot1dStaticTable 1 }

Dot1dStaticEntry ::=

SEQUENCE {
    dot1dStaticAddress       MacAddress,
    dot1dStaticReceivePort   Integer32,
    dot1dStaticAllowedToGoTo OCTET STRING,
    dot1dStaticStatus        INTEGER
}

dot1dStaticAddress OBJECT-TYPE

SYNTAX      MacAddress
MAX-ACCESS  read-create
STATUS      current
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
    "IEEE 802.1D-1998: clause 7.9.1, 7.9.2"
::= { dot1dStaticEntry 1 }

dot1dStaticReceivePort OBJECT-TYPE

SYNTAX      Integer32 (0..65535)
MAX-ACCESS  read-create
STATUS      current
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 (SIZE (0..512))
MAX-ACCESS  read-create
STATUS      current
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.)  The
    default value of this object is a string of ones of
    appropriate length.

    The value of this object may exceed the required minimum
    maximum message size of some SNMP transport (484 bytes,
    in the case of SNMP over UDP, see RFC 3417, section 3.2).
    SNMP engines on bridges supporting a large number of
    ports must support appropriate maximum message sizes."
::= { dot1dStaticEntry 3 }

dot1dStaticStatus OBJECT-TYPE

SYNTAX      INTEGER {
                other(1),
                invalid(2),
                permanent(3),
                deleteOnReset(4),
                deleteOnTimeout(5)
            }
MAX-ACCESS  read-create
STATUS      current
DESCRIPTION
    "This object indicates the status of this entry.
    The default value is permanent(3).
        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 }

– ———————————————————- – – Notifications for use by Bridges – ———————————————————- – – Notifications for the Spanning Tree Protocol – ———————————————————- –

newRoot NOTIFICATION-TYPE

-- OBJECTS     { }
STATUS      current
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.  Implementation
    of this trap is optional."
::= { dot1dNotifications 1 }

topologyChange NOTIFICATION-TYPE

-- OBJECTS     { }
STATUS      current
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.  Implementation of
    this trap is optional."
::= { dot1dNotifications 2 }

– ———————————————————- – – IEEE 802.1D MIB - Conformance Information – ———————————————————- –

dot1dGroups OBJECT IDENTIFIER ::= { dot1dConformance 1 } dot1dCompliances OBJECT IDENTIFIER ::= { dot1dConformance 2 }

– ———————————————————- – – units of conformance – ———————————————————- –

– ———————————————————- – – the dot1dBase group – ———————————————————- –

dot1dBaseBridgeGroup OBJECT-GROUP

OBJECTS {
    dot1dBaseBridgeAddress,
    dot1dBaseNumPorts,
    dot1dBaseType
}
STATUS      current
DESCRIPTION
    "Bridge level information for this device."
::= { dot1dGroups 1 }

dot1dBasePortGroup OBJECT-GROUP

OBJECTS {
    dot1dBasePort,
    dot1dBasePortIfIndex,
    dot1dBasePortCircuit,
    dot1dBasePortDelayExceededDiscards,
    dot1dBasePortMtuExceededDiscards
}
STATUS      current
DESCRIPTION
    "Information for each port on this device."
::= { dot1dGroups 2 }

– ———————————————————- – – the dot1dStp group – ———————————————————- –

dot1dStpBridgeGroup OBJECT-GROUP

OBJECTS {
    dot1dStpProtocolSpecification,
    dot1dStpPriority,
    dot1dStpTimeSinceTopologyChange,
    dot1dStpTopChanges,
    dot1dStpDesignatedRoot,
    dot1dStpRootCost,
    dot1dStpRootPort,
    dot1dStpMaxAge,
    dot1dStpHelloTime,
    dot1dStpHoldTime,
    dot1dStpForwardDelay,
    dot1dStpBridgeMaxAge,
    dot1dStpBridgeHelloTime,
    dot1dStpBridgeForwardDelay
}
STATUS      current
DESCRIPTION
    "Bridge level Spanning Tree data for this device."
::= { dot1dGroups 3 }

dot1dStpPortGroup OBJECT-GROUP

OBJECTS {
    dot1dStpPort,
    dot1dStpPortPriority,
    dot1dStpPortState,
    dot1dStpPortEnable,
    dot1dStpPortPathCost,
    dot1dStpPortDesignatedRoot,
    dot1dStpPortDesignatedCost,
    dot1dStpPortDesignatedBridge,
    dot1dStpPortDesignatedPort,
    dot1dStpPortForwardTransitions
}
STATUS      current
DESCRIPTION
    "Spanning Tree data for each port on this device."
::= { dot1dGroups 4 }

dot1dStpPortGroup2 OBJECT-GROUP

OBJECTS {
    dot1dStpPort,
    dot1dStpPortPriority,
    dot1dStpPortState,
    dot1dStpPortEnable,
    dot1dStpPortDesignatedRoot,
    dot1dStpPortDesignatedCost,
    dot1dStpPortDesignatedBridge,
    dot1dStpPortDesignatedPort,
    dot1dStpPortForwardTransitions,
    dot1dStpPortPathCost32
}
STATUS      current
DESCRIPTION
    "Spanning Tree data for each port on this device."
::= { dot1dGroups 5 }

dot1dStpPortGroup3 OBJECT-GROUP

OBJECTS {
    dot1dStpPortPathCost32
}
STATUS      current
DESCRIPTION
    "Spanning Tree data for devices supporting 32-bit
     path costs."
::= { dot1dGroups 6 }

– ———————————————————- – – the dot1dTp group – ———————————————————- –

dot1dTpBridgeGroup OBJECT-GROUP

OBJECTS {
    dot1dTpLearnedEntryDiscards,
    dot1dTpAgingTime
}
STATUS      current
DESCRIPTION
    "Bridge level Transparent Bridging data."
::= { dot1dGroups 7 }

dot1dTpFdbGroup OBJECT-GROUP

OBJECTS {

    dot1dTpFdbAddress,
    dot1dTpFdbPort,
    dot1dTpFdbStatus
}
STATUS      current
DESCRIPTION
    "Filtering Database information for the Bridge."
::= { dot1dGroups 8 }

dot1dTpGroup OBJECT-GROUP

OBJECTS {
    dot1dTpPort,
    dot1dTpPortMaxInfo,
    dot1dTpPortInFrames,
    dot1dTpPortOutFrames,
    dot1dTpPortInDiscards
}
STATUS      current
DESCRIPTION
    "Dynamic Filtering Database information for each port of
    the Bridge."
::= { dot1dGroups 9 }

– ———————————————————- – – The Static (Destination-Address Filtering) Database – ———————————————————- –

dot1dStaticGroup OBJECT-GROUP

OBJECTS {
    dot1dStaticAddress,
    dot1dStaticReceivePort,
    dot1dStaticAllowedToGoTo,
    dot1dStaticStatus
}
STATUS      current
DESCRIPTION
    "Static Filtering Database information for each port of
    the Bridge."
::= { dot1dGroups 10 }

– ———————————————————- – – The Trap Notification Group – ———————————————————- –

dot1dNotificationGroup NOTIFICATION-GROUP

NOTIFICATIONS {
    newRoot,
    topologyChange
}
STATUS      current
DESCRIPTION
    "Group of objects describing notifications (traps)."
::= { dot1dGroups 11 }

– ———————————————————- – – compliance statements – ———————————————————- –

bridgeCompliance1493 MODULE-COMPLIANCE

STATUS      current
DESCRIPTION
    "The compliance statement for device support of bridging
    services, as per RFC1493."

MODULE
    MANDATORY-GROUPS {
        dot1dBaseBridgeGroup,
        dot1dBasePortGroup
    }

GROUP   dot1dStpBridgeGroup
DESCRIPTION
    "Implementation of this group is mandatory for bridges
    that support the Spanning Tree Protocol."

GROUP   dot1dStpPortGroup
DESCRIPTION
    "Implementation of this group is mandatory for bridges
    that support the Spanning Tree Protocol."

GROUP   dot1dTpBridgeGroup
DESCRIPTION
    "Implementation of this group is mandatory for bridges
    that support the transparent bridging mode.  A
    transparent or SRT bridge will implement this group."

GROUP   dot1dTpFdbGroup
DESCRIPTION
    "Implementation of this group is mandatory for bridges
    that support the transparent bridging mode.  A
    transparent or SRT bridge will implement this group."

GROUP   dot1dTpGroup
DESCRIPTION
    "Implementation of this group is mandatory for bridges

    that support the transparent bridging mode.  A
    transparent or SRT bridge will implement this group."

GROUP   dot1dStaticGroup
DESCRIPTION
    "Implementation of this group is optional."

GROUP dot1dNotificationGroup
DESCRIPTION
    "Implementation of this group is optional."
::= { dot1dCompliances 1 }

bridgeCompliance4188 MODULE-COMPLIANCE

STATUS      current
DESCRIPTION
    "The compliance statement for device support of bridging
    services.  This supports 32-bit Path Cost values and the
    more restricted bridge and port priorities, as per IEEE
    802.1t.

    Full support for the 802.1D management objects requires that
    the SNMPv2-MIB [RFC3418] objects sysDescr, and sysUpTime, as
    well as the IF-MIB [RFC2863] objects ifIndex, ifType,
    ifDescr, ifPhysAddress, and ifLastChange are implemented."

MODULE
    MANDATORY-GROUPS {
        dot1dBaseBridgeGroup,
        dot1dBasePortGroup
    }

GROUP   dot1dStpBridgeGroup
DESCRIPTION
    "Implementation of this group is mandatory for
    bridges that support the Spanning Tree Protocol."

OBJECT dot1dStpPriority
SYNTAX Integer32 (0|4096|8192|12288|16384|20480|24576
                 |28672|32768|36864|40960|45056|49152
                 |53248|57344|61440)
DESCRIPTION
    "The possible values defined by IEEE 802.1t."

GROUP   dot1dStpPortGroup2
DESCRIPTION
    "Implementation of this group is mandatory for
    bridges that support the Spanning Tree Protocol."

GROUP   dot1dStpPortGroup3
DESCRIPTION
    "Implementation of this group is mandatory for bridges
     that support the Spanning Tree Protocol and 32-bit path
     costs.  In particular, this includes devices supporting
     IEEE 802.1t and IEEE 802.1w."

OBJECT dot1dStpPortPriority
SYNTAX Integer32 (0|16|32|48|64|80|96|112|128
                 |144|160|176|192|208|224|240)
DESCRIPTION
    "The possible values defined by IEEE 802.1t."

GROUP   dot1dTpBridgeGroup
DESCRIPTION
    "Implementation of this group is mandatory for
    bridges that support the transparent bridging
    mode.  A transparent or SRT bridge will implement
    this group."

GROUP   dot1dTpFdbGroup
DESCRIPTION
    "Implementation of this group is mandatory for
    bridges that support the transparent bridging
    mode.  A transparent or SRT bridge will implement
    this group."

GROUP   dot1dTpGroup
DESCRIPTION
    "Implementation of this group is mandatory for
    bridges that support the transparent bridging
    mode.  A transparent or SRT bridge will implement
    this group."

GROUP   dot1dStaticGroup
DESCRIPTION
    "Implementation of this group is optional."

GROUP dot1dNotificationGroup
DESCRIPTION
    "Implementation of this group is optional."
::= { dot1dCompliances 2 }

END