>> MIB - Management Information Base

>> Table: dot1dStpPortTable - (.1.3.6.1.4.1.272.4.8.2.15.1)

Description: A list of information maintained by every port about the Spanning Tree Protocol state for that port.

dot1dStpPortTable
OIDNameTypeAccess
.1IfIndexINTEGERR
.2NumberINTEGERR
.3PriorityINTEGERRW
.4StateENUMR
.5EnableENUMRW
.6PathCostINTEGERRW
.7DesignatedRootBridgeIdR
.8DesignatedCostINTEGERR
.9DesignatedBridgeBridgeIdR
.10DesignatedPortINTEGERR
.11ForwardTransitionsCounterR
.12BackupForIfIndexINTEGERRW

IfIndex
The value of the instance of the ifIndex object defined
in MIB-II, for the interface corresponding to this port.
Number
The number of the port.
Priority
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.
State
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).
Enumerations:
  • disabled (1)
  • blocking (2)
  • listening (3)
  • learning (4)
  • forwarding (5)
  • broken (6)
Enable
The enabled/disabled status of the port.At least two
ports must be enabled for bridging to be possible.
Enumerations:
  • enabled (1)
  • disabled (2)
PathCost
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.
DesignatedRoot
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.
DesignatedCost
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.
DesignatedBridge
The Bridge Identifier of the bridge which this
port considers to be the Designated Bridge for
this port's segment.
DesignatedPort
The Port Identifier of the port on the Designated
Bridge for this port's segment.
ForwardTransitions
The number of times this port has transitioned
from the Learning state to the Forwarding state.
BackupForIfIndex
This port is used as a backup line
for the respective interface.


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