path: root/MIBS/MSTP-MIB

MSTP-MIB DEFINITIONS ::= BEGIN

    IMPORTS
        MODULE-IDENTITY, OBJECT-TYPE, Counter32, Integer32
            FROM SNMPv2-SMI
        TruthValue, RowStatus, DisplayString
            FROM SNMPv2-TC
        TimeTicks
            FROM RFC1155-SMI 
        BridgeId, Timeout, dot1dBridge
            FROM BRIDGE-MIB;
        --gbnL2 FROM ADMIN-MASTER-MIB;

    mstpMib MODULE-IDENTITY
        LAST-UPDATED "0412050000Z"
        ORGANIZATION "IETF Bridge MIB Working Group"
        CONTACT-INFO
                     "Email: Bridge-mib@ietf.org"
        DESCRIPTION
                     " The Bridge MIB Extension module for managing Sdevices
                       that support the Multiple Spanning Tree Protocol defined
                       by IEEE 802.1s."
        REVISION     "0412050000Z"
        DESCRIPTION
                     "Draft 1"
        ::= { dot1dBridge 8 }

    mstpMIBObjects    OBJECT IDENTIFIER ::= { mstpMib 1 }
    dot1sStp          OBJECT IDENTIFIER ::= { mstpMIBObjects 1 }
    
          dot1sStpName OBJECT-TYPE
              SYNTAX      DisplayString (SIZE (0..32))
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                          "The configuration name that identifies the MST
                           region and is used as one of the inputs in the 
                           computation of the MST Configuration Identifier.
                           This object does not have any default value."
              REFERENCE
                          "IEEE 802.1s clause 13.7"
              ::= { dot1sStp 1 }
  
          dot1sStpRevision OBJECT-TYPE
              SYNTAX      Integer32 (0..65535)
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                          "This object identifies the MST revision that 
                           identifies the MST region and is used as one
                           of the inputs in the computation of the MST 
                           configuration Identifier. This object does not
                           have any default value."
              REFERENCE
                          "IEEE 802.1s: Section 13.7"
              ::= { dot1sStp 2 }
  
          dot1sStpEnable OBJECT-TYPE
              SYNTAX      TruthValue
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "This parameter is used for enabling or disabling
                           MST globally on all the bridging ports."
              REFERENCE
                          "IEEE 802.1s"
              DEFVAL      { 2 }
              ::= { dot1sStp 3 }
  
          dot1sStpBridgeMaxAge OBJECT-TYPE
              SYNTAX      Timeout (6..40)
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                          "The value that all bridges use for MaxAge when
                           this bridge is acting as the root. This parameter 
                           is applicable for all MST Instances including CIST."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.4, 13.23.10"
              DEFVAL      { 20 }
              ::= { dot1sStp 4 }
  
          dot1sStpBridgeHelloTime OBJECT-TYPE
              SYNTAX      Timeout (1..10)
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                          "The value that all bridges use for HelloTime when
                           this bridge is acting as the root. This parameter 
                           is applicable for all MST Instances including CIST."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.4, 13.23.10"
              DEFVAL      { 2 }
              ::= { dot1sStp 5 }
  
          dot1sStpBridgeForwardDelay OBJECT-TYPE
              SYNTAX      Timeout (4..30)
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                          "The value that all bridges use for ForwardDelay
                           when this bridge is acting as the root. This parameter 
                           is applicable for all MST Instances including CIST."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.4, 13.23.10"
              DEFVAL      { 15 }
              ::= { dot1sStp 6 }
    
          dot1sStpBridgeMaxHops OBJECT-TYPE
              SYNTAX      Unsigned32 (0..255)
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                         "The maximum number of hops that the information for a
                          particular Spanning Tree instance may traverse (via
                          relay of BPDUs within the applicable MST region) before
                          being discarded.  This value is used only if this bridge
                          is the CIST Regional Root and/or the MSTI Regional Root
                          for one or more Multiple Spanning Tree instances."
              DEFVAL { 20 }
              ::= { dot1sStp 7 }
              
          dot1sStpTxHoldCount OBJECT-TYPE
              SYNTAX      Integer32 (1..15)
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "The value used by the Port Transmit state machine to
                           limit the maximum transmission rate of MST BPDUs within
                           the hello interval."
              REFERENCE
                          "IEEE 802.1s: Section 13.22"
              DEFVAL      { 3 }
              ::= { dot1sStp 8 }
              
          dot1sStpProtocolSpecification OBJECT-TYPE
              SYNTAX      INTEGER {
                            unknown(1),
                            decLb100(2),
                            ieee8021d(3),
                            ieee8021w(4),
                            ieee8021s(5)
                          }
              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 802.1w
                           implementations will return 'ieee8021w(4)'. IEEE
                           802.1s implementations will return 'ieee8021s(5). If
                           future versions of the IEEE Spanning Tree Protocol
                           are released that are incompatible with the
                           current version a new value will be defined."
              REFERENCE
                          "IEEE 802.1s: Section 13.22"
              DEFVAL      { 5 }
              ::= { dot1sStp 9 }
  
          dot1sStpInstTable OBJECT-TYPE
              SYNTAX      SEQUENCE OF Dot1sStpInstEntry 
              MAX-ACCESS  not-accessible
              STATUS      current
              DESCRIPTION
                          "A table that contains MST instance-specific
                           configuration and operational information."
              ::= { dot1sStp 10 }
           
          dot1sStpInstEntry OBJECT-TYPE
              SYNTAX      Dot1sStpInstEntry
              MAX-ACCESS  not-accessible
              STATUS      current
              DESCRIPTION
                          "A list of information maintained by every mst instance
                           about the STP topology for that instance."
              INDEX       { dot1sStpInstId }
              ::= { dot1sStpInstTable 1 }
  
          Dot1sStpInstEntry ::=
              SEQUENCE {
                  dot1sStpInstId
                      Integer32, 
                  dot1sStpPriority                     
                      Integer32,
                  dot1sStpInstTimeSinceTopologyChange  
                      TimeTicks,
                  dot1sStpInstTopChanges               
                      Counter32,
                  dot1sStpInstDesignatedRoot           
                      BridgeId,
                  dot1sStpInstRootCost                 
                      Integer32,
                  dot1sStpInstRootPort                 
                      Integer32,
                  dot1sStpInstMaxAge
                      Timeout,                   
                  dot1sStpInstHelloTime                
                      Timeout,
                  dot1sStpInstForwardDelay             
                      Timeout,
                  dot1sStpInstAdminEnable 
                      TruthValue,
                  dot1sStpInstOperEnable 
                      TruthValue 
              }
              
          dot1sStpInstId OBJECT-TYPE
              SYNTAX      Integer32 (1..64)
              MAX-ACCESS  not-accessible
              STATUS      current
              DESCRIPTION
                          "Identifier of this MST Instance"
              REFERENCE
                          "IEEE 802.1s"
              ::= { dot1sStpInstEntry 1 }
  
          dot1sStpPriority OBJECT-TYPE
              SYNTAX      Integer32 (0..61440)
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                          "The value of the write-able portion of the Bridge
                           ID, i.e., the first two octets, out of which the 
                           priority is the most significant 4 bits of the first 
                           octet of the (8 octet long) Bridge ID.  The other 
                           (last) 6 octets of the Bridge ID are given by the 
                           value of dot1dBaseBridgeAddress in the BRIDGE-MIB. 
                           The value of this object should always be a multiple
                           of 4096."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.2"
              DEFVAL      { 32768 }
              ::= { dot1sStpInstEntry 2 }
              
          dot1sStpInstTimeSinceTopologyChange OBJECT-TYPE
              SYNTAX      TimeTicks
              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 running MSTP."
              REFERENCE
                          " IEEE 802.1D-1990: Section 6.8.1.1.3"
              ::= { dot1sStpInstEntry 3 }
  
          dot1sStpInstTopChanges OBJECT-TYPE
              SYNTAX      Counter32
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "The total number of topology changes detected by
                           this bridge entity running MST since the management
                           entity was last reset or initialized."
              REFERENCE
                          " IEEE 802.1D-1990: Section 6.8.1.1.3"
              ::= { dot1sStpInstEntry 4 }
  
          dot1sStpInstDesignatedRoot OBJECT-TYPE
              SYNTAX      BridgeId
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "The bridge identifier of the root of the 
                           corresponding spanning tree instance as determined
                           by the Spanning Tree Protocol for that instance.  
                           This value is used as the CIST Root Identifier or MSTI
                           regional root identifier parameter in all MST BPDUs 
                           originated by this node."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.6, 13.23.12"
              ::= { dot1sStpInstEntry 5 }
  
          dot1sStpInstRootCost OBJECT-TYPE
              SYNTAX      Integer32
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "The cost of the path to the root as seen from
                           this bridge for this instance."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.6, 13.23.12"
              ::= { dot1sStpInstEntry 6 }
  
          dot1sStpInstRootPort OBJECT-TYPE
              SYNTAX      Integer32
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "The port number of the port which offers the
                           lowest cost path from this bridge to the root
                           bridge for this instance."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.6, 13.23.12"
              ::= { dot1sStpInstEntry 7 }
  
          dot1sStpInstMaxAge OBJECT-TYPE
              SYNTAX      Timeout
              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, which is 
                           advertised by the Root bridge and is currently 
                           used for this MST Instance."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.7, 13.23.13"
              ::= { dot1sStpInstEntry 8 }
  
          dot1sStpInstHelloTime OBJECT-TYPE
              SYNTAX      Timeout
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "The period of time between the transmission of
                           MST BPDUs 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, which is advertised by the Root bridge and is 
                           currently used for this MST Instance."
              REFERENCE
                          "IEEE 802.1s: Section 13.23.7, 13.23.13"
              ::= { dot1sStpInstEntry 9 }
  
          dot1sStpInstForwardDelay OBJECT-TYPE
              SYNTAX      Timeout
              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 Discarding 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
                           dot1sStpBridgeForwardDelay which is the value that
                           this bridge and all others would start using
                           if/when this bridge were to become the root.]"
              REFERENCE
                          "IEEE 802.1s: Section 13.23.7, 13.23.13"
              ::= { dot1sStpInstEntry 10 }
  
          dot1sStpInstAdminEnable OBJECT-TYPE
              SYNTAX      TruthValue
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                          "The administrative enabled/disabled status of the
                           instance"
              REFERENCE
                          "IEEE 802.1s"
              DEFVAL      { 2 }
              ::= { dot1sStpInstEntry 11 }
  
          dot1sStpInstOperEnable OBJECT-TYPE
              SYNTAX      TruthValue
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                          "The operational enabled/disabled status of the
                           instance. An MST Instance may be administratively 
                           enabled but may not be operationally running, for
                           example, when no VLAN is mapped to that MST Instance."
              REFERENCE
                          "IEEE 802.1s"
              DEFVAL      { 2 }
              ::= { dot1sStpInstEntry 12 }
  
          dot1sStpPortTable OBJECT-TYPE
              SYNTAX      SEQUENCE OF Dot1sStpPortEntry
              MAX-ACCESS  not-accessible
              STATUS      current
              DESCRIPTION
                  "A table that contains MSTP ports' information."
              ::= { dot1sStp 11 }
  
          dot1sStpPortEntry OBJECT-TYPE
              SYNTAX  Dot1sStpPortEntry
              MAX-ACCESS  not-accessible
              STATUS  current
              DESCRIPTION
                  "A list of information maintained by every MST port
                   about the Spanning Tree Protocol state for that port."
              INDEX   { dot1sStpPort }
              ::= { dot1sStpPortTable 1 }
  
          Dot1sStpPortEntry ::=
              SEQUENCE {
                  dot1sStpPort
                      Integer32, 
                  dot1sStpPortAdminEdgePort
                      TruthValue,
                  dot1sStpPortAdminPointToPoint
                      INTEGER,
                  dot1sStpPortOperEdgePort
                      TruthValue,
                  dot1sStpPortOperPointToPoint
                      TruthValue,
                  dot1sStpPortExterPathCost
                      Integer32,
                  dot1sStpVersion
                      INTEGER,
                  dot1sStpPortSnoopingEnable
                      TruthValue
              }
  
          dot1sStpPort OBJECT-TYPE
              SYNTAX  Integer32 (0..65535)
              MAX-ACCESS  not-accessible
              STATUS  current
              DESCRIPTION
                  "The port number of the port for which this entry
                   contains Spanning Tree Protocol management
                   information."
               REFERENCE
                   " IEEE 802.1s: Section 13.24.21"
               ::= { dot1sStpPortEntry 1 }
  
  
          dot1sStpPortAdminEdgePort OBJECT-TYPE
              SYNTAX      TruthValue
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                  "The administrative value of the Edge Port parameter.  A
                   value of TRUE(1) indicates that this port should be
                   assumed as an edge-port and a value of FALSE(2) indicates
                   that this port should be assumed as a non-edge-port."
              REFERENCE
                  "IEEE 802.1s: Section 12.8.2.1.3"
           ::= { dot1sStpPortEntry 2 }
  
          dot1sStpPortAdminPointToPoint OBJECT-TYPE
              SYNTAX      INTEGER {
                              forceTrue(1),
                              forceFalse(2),
                              auto(3)
                          }
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                  "The administrative point-to-point status of the LAN segment
                   attached to this port.  A value of forceTrue(1) indicates that
                   this port should always be treated as if it is connected to
                   a point-to-point link.  A value of forceFalse(2) indicates
                   that this port should be treated as having a shared media
                   connection.  A value of auto(3) indicates that this port is
                   considered to have a point-to-point link if it is an Aggregator
                   and all of its members are aggregatable, or if the MAC entity
                   is configured for full duplex operation, either through
                   auto-negotiation or by management means."
             REFERENCE
                 "IEEE 802.1s: Section 13.18"
             ::= { dot1sStpPortEntry 3 }
  
          dot1sStpPortOperEdgePort OBJECT-TYPE
              SYNTAX      TruthValue
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                  "The operational value of the Edge Port parameter.  A
                   value of TRUE(1) indicates that this port should be
                   assumed as an edge-port and a value of FALSE(2) indicates
                   that this port should be assumed as a non-edge-port."
              REFERENCE
                  "IEEE 802.1s: Section 12.8.2.1.3"
           ::= { dot1sStpPortEntry 4 } 
                         
           dot1sStpPortOperPointToPoint OBJECT-TYPE
               SYNTAX      TruthValue
               MAX-ACCESS  read-only
               STATUS      current
               DESCRIPTION
                   "The operational point-to-point status of the LAN segment
                    attached to this port.  It indicates whether a port is
                    considered to have a point-to-point connection or not.
                    The value is determined by management or by auto-detection,
                    as described in the dot1dStpPortAdminPointToPoint object."
               REFERENCE
                   "IEEE 802.1s: Section 13.18"
               ::= { dot1sStpPortEntry 5 }
               
           dot1sStpPortExterPathCost 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-1990 recommends that the
                   default value of this parameter be in inverse
                   proportion to the speed of the attached LAN."
              REFERENCE
                  "IEEE 802.1s: Section 13.24.8, 13.24.17"
              ::= { dot1sStpPortEntry 6 }
              
          dot1sStpVersion OBJECT-TYPE
              SYNTAX      INTEGER {
                              stpCompatible(0),
                              rstp-mstp(2)
                          }
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                  "The version of Spanning Tree Protocol the bridge is
                   currently running.  The value 'stpCompatible(0)'
                   indicates the Spanning Tree Protocol specified in
                   IEEE 802.1D and 'rstp/mstp(2)' indicates the Rapid 
                   Spanning Tree Protocol specified in IEEE 802.1w and
                   Multiple Spanning Tree Protocol specified in IEEE
                   802.1s. New value may be defined as future versions 
                   of the protocol become available."
              REFERENCE
                  "IEEE 802.1s: Section 14.2"
              DEFVAL      { rstp-mstp }
              ::= { dot1sStpPortEntry 7 }
              
          dot1sStpInstPortTable OBJECT-TYPE
              SYNTAX  SEQUENCE OF Dot1sStpInstPortEntry
              MAX-ACCESS  not-accessible
              STATUS  current
              DESCRIPTION
                  "A table that contains MST port and instance 
                   information."
              ::= { dot1sStp 12 }
  
          dot1sStpInstPortEntry OBJECT-TYPE
              SYNTAX  Dot1sStpInstPortEntry
              MAX-ACCESS  not-accessible
              STATUS  current
              DESCRIPTION
                  "A list of information maintained by every MST port 
                   for each MST instance it belongs to about the Spanning 
                   Tree Protocol state for that port."
              INDEX   { dot1sStpInstId, dot1sStpPort }
              ::= { dot1sStpInstPortTable 1 }
  
          Dot1sStpInstPortEntry ::=
              SEQUENCE {
                  dot1sStpInstPortPriority
                      Integer32,
                  dot1sStpInstPortState
                      INTEGER,
                  dot1sStpInstPortPathCost
                      Integer32,
                  dot1sStpInstPortDesignatedRoot
                      BridgeId,
                  dot1sStpInstPortDesignatedCost
                      Integer32,
                  dot1sStpInstPortDesignatedBridge
                      BridgeId,
                  dot1sStpInstPortDesignatedPort
                      OCTET STRING,
                  dot1sStpInstPortForwardTransitions
                      Counter32,
                  dot1sStpInstPortRole
                      INTEGER
                                
              }
  
          dot1sStpInstPortPriority OBJECT-TYPE
              SYNTAX  Integer32 (0..240)
              MAX-ACCESS  read-write
              STATUS  current
              DESCRIPTION
                  "The value of the priority field which is
                   contained in the most significant 4 bits 
                   of the first (in network byte order)
                   octet of the (2 octet long) Port ID. As it is
                   contained only in 4 bits, the value has to be 
                   a multiple of 16. The other octet of the Port 
                   ID is given by the value of dot1dStpPort."
          REFERENCE
                  "IEEE 802.1s: Section 13.24.21"
              ::= { dot1sStpInstPortEntry 1 }
  
          dot1sStpInstPortState OBJECT-TYPE
              SYNTAX  INTEGER {
                  disabled(1),
                  discarding(2),
                  learning(3),
                  forwarding(4)
              }
              MAX-ACCESS  read-write
              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. For ports which
                   are disabled (see dot1dStpPortEnable), this object
                   will have a value of disabled(1)."
              REFERENCE
                  "IEEE 802.1s: Section 13.16"
              ::= { dot1sStpInstPortEntry 2 }
  
          dot1sStpInstPortPathCost 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-1990 recommends that the
                   default value of this parameter be in inverse
                   proportion to the speed of the attached LAN."
              REFERENCE
                  "IEEE 802.1s: Section 13.24.8, 13.24.17"
              ::= { dot1sStpInstPortEntry 3 }
  
          dot1sStpInstPortDesignatedRoot 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 802.1s: Section 13.24.4, 13.24.11"
               ::= { dot1sStpInstPortEntry 4 }
  
          dot1sStpInstPortDesignatedCost 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 802.1s: Section 13.24.4, 13.24.11"
              ::= { dot1sStpInstPortEntry 5 }
  
          dot1sStpInstPortDesignatedBridge OBJECT-TYPE
              SYNTAX  BridgeId
              MAX-ACCESS  read-only
              STATUS  current
              DESCRIPTION
                  "The Bridge Identifier of the bridge which this
                   port considers to be the Designated Bridge for
                   this port's segment."
              REFERENCE
                  "IEEE 802.1s: Section 13.24.4, 13.24.11"
              ::= { dot1sStpInstPortEntry 6 }
  
          dot1sStpInstPortDesignatedPort 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 802.1s: Section 13.24.4, 13.24.11"
              ::= { dot1sStpInstPortEntry 7 }
  
          dot1sStpInstPortForwardTransitions 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."
              REFERENCE
                  "IEEE 802.1s"
              ::= { dot1sStpInstPortEntry 8 }
  
          dot1sStpInstPortRole OBJECT-TYPE
              SYNTAX INTEGER {
                  master(0),
                  alternate-backup(1),
                  root(2),
                  designated(3)
              }
              MAX-ACCESS  read-only
              STATUS      current
              DESCRIPTION
                  "The role of the port. As per IEEE 802.1s, the 
                   port can have any of the following roles:
                   Disabled, Root, Designated, Alternate, Backup,
                   Master"
              REFERENCE
                  "IEEE 802.1s: Section 13.24.25"
              ::= { dot1sStpInstPortEntry 9 }
          
          dot1sStpVlanTable OBJECT-TYPE
              SYNTAX  SEQUENCE OF Dot1sStpVlanEntry
              MAX-ACCESS  not-accessible
              STATUS  current
              DESCRIPTION
                  "A table that contains MSTI-VLAN mapping."
              ::= { dot1sStp 13 }
          
          dot1sStpVlanEntry OBJECT-TYPE
              SYNTAX  Dot1sStpVlanEntry
              MAX-ACCESS  not-accessible
              STATUS  current
              DESCRIPTION
                  "A list of information maintained by every MST instance 
                   about the VLANs mapped to that instance."
              INDEX   { dot1sStpVlanIndex }
              ::= { dot1sStpVlanTable 1 }
  
          Dot1sStpVlanEntry ::=
              SEQUENCE {
                  dot1sStpVlanIndex
                      Integer32, 
                  dot1sStpVlanInstId
                      Integer32
              }
  
          dot1sStpVlanIndex OBJECT-TYPE
              SYNTAX      Integer32 (1..4094)
              MAX-ACCESS  not-accessible
              STATUS      current
              DESCRIPTION
                  "This is the primary index to the MSTI-VLAN Table. 
                   It signifies the index to the VLAN range entry in 
                   the table."
              REFERENCE
                  "IEEE 802.1s"
           ::= { dot1sStpVlanEntry 1 }
  
          dot1sStpVlanInstId OBJECT-TYPE
              SYNTAX      Integer32 (0..15)
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                  "The MST Instance value the VLAN mapped to."
             REFERENCE
                 "IEEE 802.1s"
             ::= { dot1sStpVlanEntry 2 }
     
          dot1sStpPortSnoopingEnable  OBJECT-TYPE
              SYNTAX      TruthValue
              MAX-ACCESS  read-write
              STATUS      current
              DESCRIPTION
                  "This parameter is used for enabling or disabling
                           digest snooping on  the bridge port."
                  --使能或关闭摘要侦听特性
           ::= { dot1sStpPortEntry 8}         
           
          dot1sStpTrapTable OBJECT IDENTIFIER ::= { dot1sStp 14 }
          
          dot1sStpTrapEntry OBJECT IDENTIFIER ::= { dot1sStpTrapTable 1 }
  
          dot1sStpInstNewRoot NOTIFICATION-TYPE
              OBJECTS { dot1sStpInstDesignatedRoot }
              STATUS  current
              DESCRIPTION
                  "Root bridge changed for the mstp."
       	     ::= { dot1sStpTrapEntry 1 }
       	     
       	  dot1sStpInstPortForwarding NOTIFICATION-TYPE
              OBJECTS { dot1sStpPort }
              STATUS  current
              DESCRIPTION
                  "Port status is turned from blocking to forwarding."
       	     ::= { dot1sStpTrapEntry 2 }
         
                          
  END