-- Changes to rfc1493 (Bridge MIB):

--      No changes needed.

-- dperkins@scruznet.com





BRIDGE-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 n802.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-1990 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 }

          -- separately documented



          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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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 (1..65535)

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The port number of the port for which this entry

                      contains bridge management information."

              ::= { dot1dBasePortEntry 1 }



          dot1dBasePortIfIndex OBJECT-TYPE

              SYNTAX  INTEGER

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The value of the instance of the ifIndex object,

                      defined in MIB-II, for the interface corresponding

                      to this port."

              ::= { dot1dBasePortEntry 2 }



          dot1dBasePortCircuit OBJECT-TYPE

              SYNTAX  OBJECT IDENTIFIER

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "For a port which (potentially) has the same value

                      of dot1dBasePortIfIndex as another port on the

                      same bridge, this object contains the name of an

                      object instance unique to this port.  For example,

                      in the case where multiple ports correspond one-

                      to-one with multiple X.25 virtual circuits, this

                      value might identify an (e.g., the first) object

                      instance associated with the X.25 virtual circuit

                      corresponding to this port.



                      For a port which has a unique value of

                      dot1dBasePortIfIndex, this object can have the

                      value { 0 0 }."

              ::= { dot1dBasePortEntry 3 }



          dot1dBasePortDelayExceededDiscards OBJECT-TYPE

              SYNTAX  Counter

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The number of frames discarded by this port due

                      to excessive transit delay through the bridge.  It

                      is incremented by both transparent and source

                      route bridges."

              REFERENCE

                       "IEEE 802.1D-1990: Section 6.6.1.1.3"

              ::= { dot1dBasePortEntry 4 }



          dot1dBasePortMtuExceededDiscards OBJECT-TYPE

              SYNTAX  Counter

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The number of frames discarded by this port due

                      to an excessive size.  It is incremented by both

                      transparent and source route bridges."

              REFERENCE

                      "IEEE 802.1D-1990: Section 6.6.1.1.3"

              ::= { dot1dBasePortEntry 5 }



          -- the dot1dStp group



          -- Implementation of the dot1dStp group is optional.  It is

          -- implemented by those bridges that support the Spanning Tree

          -- Protocol.



          dot1dStpProtocolSpecification OBJECT-TYPE

              SYNTAX  INTEGER {

                          unknown(1),

                          decLb100(2),

                          ieee8021d(3)

                      }

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "An indication of what version of the Spanning

                      Tree Protocol is being run.  The value

                      'decLb100(2)' indicates the DEC LANbridge 100

                      Spanning Tree protocol.  IEEE 802.1d

                      implementations will return 'ieee8021d(3)'.  If

                      future versions of the IEEE Spanning Tree Protocol

                      are released that are incompatible with the

                      current version a new value will be defined."

              ::= { dot1dStp 1 }



          dot1dStpPriority OBJECT-TYPE

              SYNTAX  INTEGER (0..65535)

              ACCESS  read-write

              STATUS  mandatory

              DESCRIPTION

                      "The value of the write-able portion of the Bridge

                      ID, i.e., the first two octets of the (8 octet

                      long) Bridge ID.  The other (last) 6 octets of the

                      Bridge ID are given by the value of

                      dot1dBaseBridgeAddress."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.7"

              ::= { dot1dStp 2 }



          dot1dStpTimeSinceTopologyChange OBJECT-TYPE

              SYNTAX  TimeTicks

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

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

                      last time a topology change was detected by the

                      bridge entity."

              REFERENCE

                      "IEEE 802.1D-1990: Section 6.8.1.1.3"

              ::= { dot1dStp 3 }



          dot1dStpTopChanges OBJECT-TYPE

              SYNTAX  Counter

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The total number of topology changes detected by

                      this bridge since the management entity was last

                      reset or initialized."

              REFERENCE

                      "IEEE 802.1D-1990: Section 6.8.1.1.3"

              ::= { dot1dStp 4 }



          dot1dStpDesignatedRoot OBJECT-TYPE

              SYNTAX  BridgeId

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The bridge identifier of the root of the spanning

                      tree as determined by the Spanning Tree Protocol

                      as executed by this node.  This value is used as

                      the Root Identifier parameter in all Configuration

                      Bridge PDUs originated by this node."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.1"

              ::= { dot1dStp 5 }



          dot1dStpRootCost OBJECT-TYPE

              SYNTAX  INTEGER

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

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

                      this bridge."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.2"

              ::= { dot1dStp 6 }



          dot1dStpRootPort OBJECT-TYPE

              SYNTAX  INTEGER

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The port number of the port which offers the

                      lowest cost path from this bridge to the root

                      bridge."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.3"

              ::= { dot1dStp 7 }



          dot1dStpMaxAge OBJECT-TYPE

              SYNTAX  Timeout

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The maximum age of Spanning Tree Protocol

                      information learned from the network on any port

                      before it is discarded, in units of hundredths of

                      a second.  This is the actual value that this

                      bridge is currently using."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.4"

              ::= { dot1dStp 8 }



          dot1dStpHelloTime OBJECT-TYPE

              SYNTAX  Timeout

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The amount of time between the transmission of

                      Configuration bridge PDUs by this node on any port

                      when it is the root of the spanning tree or trying

                      to become so, in units of hundredths of a second.

                      This is the actual value that this bridge is

                      currently using."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.5"

              ::= { dot1dStp 9 }



          dot1dStpHoldTime OBJECT-TYPE

              SYNTAX  INTEGER

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "This time value determines the interval length

                      during which no more than two Configuration bridge

                      PDUs shall be transmitted by this node, in units

                      of hundredths of a second."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.14"

              ::= { dot1dStp 10 }



          dot1dStpForwardDelay OBJECT-TYPE

              SYNTAX  Timeout

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "This time value, measured in units of hundredths

                      of a second, controls how fast a port changes its

                      spanning state when moving towards the Forwarding

                      state.  The value determines how long the port

                      stays in each of the Listening and Learning

                      states, which precede the Forwarding state.  This

                      value is also used, when a topology change has

                      been detected and is underway, to age all dynamic

                      entries in the Forwarding Database.  [Note that

                      this value is the one that this bridge is

                      currently using, in contrast to

                      dot1dStpBridgeForwardDelay which is the value that

                      this bridge and all others would start using

                      if/when this bridge were to become the root.]"

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.6"

              ::= { dot1dStp 11 }



          dot1dStpBridgeMaxAge OBJECT-TYPE

              SYNTAX  Timeout (600..4000)

              ACCESS  read-write

              STATUS  mandatory

              DESCRIPTION

                      "The value that all bridges use for MaxAge when

                      this bridge is acting as the root.  Note that

                      802.1D-1990 specifies that the range for this

                      parameter is related to the value of

                      dot1dStpBridgeHelloTime. The granularity of this

                      timer is specified by 802.1D-1990 to be 1 second.

                      An agent may return a badValue error if a set is

                      attempted to a value which is not a whole number

                      of seconds."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.8"

              ::= { dot1dStp 12 }



          dot1dStpBridgeHelloTime OBJECT-TYPE

              SYNTAX  Timeout (100..1000)

              ACCESS  read-write

              STATUS  mandatory

              DESCRIPTION

                      "The value that all bridges use for HelloTime when

                      this bridge is acting as the root.  The

                      granularity of this timer is specified by 802.1D-

                      1990 to be 1 second.  An agent may return a

                      badValue error if a set is attempted to a value

                      which is not a whole number of seconds."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.9"

              ::= { 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-1990 specifies that the range for this

                      parameter is related to the value of

                      dot1dStpBridgeMaxAge.  The granularity of this

                      timer is specified by 802.1D-1990 to be 1 second.

                      An agent may return a badValue error if a set is

                      attempted to a value which is not a whole number

                      of seconds."

              REFERENCE

                      "IEEE 802.1D-1990: Section 4.5.3.10"

              ::= { 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 (1..65535)

              ACCESS  read-only

              STATUS  mandatory

              DESCRIPTION

                      "The port number of the port for which this entry

                      contains Spanning Tree Protocol management

                      information."

              REFERENCE

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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.  802.1D-1990 recommends that the

                      default value of this parameter be in inverse

                      proportion to the speed of the attached LAN."

              REFERENCE

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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 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

                      "IEEE 802.1D-1990: Section 6.7.1.1.3"

              ::= { dot1dTp 1 }



          dot1dTpAgingTime OBJECT-TYPE

              SYNTAX   INTEGER (10..1000000)

              ACCESS   read-write

              STATUS   mandatory

              DESCRIPTION

                      "The timeout period in seconds for aging out

                      dynamically learned forwarding information.

                      802.1D-1990 recommends a default of 300 seconds."

              REFERENCE

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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 (1..65535)

              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, including bridge management

                      frames."

              REFERENCE

                      "IEEE 802.1D-1990: 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, including bridge management

                      frames."

              REFERENCE

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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

                      "IEEE 802.1D-1990: 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.)  The default value of

                      this object is a string of ones of appropriate

                      length."

              ::= { 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.

                      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 }



          -- 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.  Implementation of this trap is

                      optional."

              ::= 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.  Implementation of this trap is

                      optional."

              ::= 2



END

