Field

Description

message age

Age of the protocol information for a port and the value of the maximum age

parameter (shown in parenthesis) recorded by the switch.

 

designated_root

MAC address of the root bridge.

designated cost

Total path cost to reach the root bridge.

designated_bridge

Bridge to which this switch forwards traffic away from the root bridge.

designated_port

STP port through which this switch forwards traffic away from the root bridge.

 

Value of the topology change acknowledgment flag in the next configured bridge

top_change_ack

protocol data unit (BPDU) to be transmitted on the associated port. The flag is set

 

in reply to a topology change notification BPDU.

 

 

config_pending

Indicates whether a configured BPDU is to be transmitted on expiration of the hold

timer for the port.

 

port_inconsistency

Indicates whether the port is in an inconsistent state.

 

Number of BPDUs transmitted from the port. A number in parentheses indicates the

config BPDU’s xmitted

number of configured BPDUs transmitted by the switch for this VLAN’s spanning

 

tree.

 

 

 

Number of BPDUs received by this port. A number in parentheses indicates the

config BPDU’s received

number of configured BPDUs received by the switch for this VLAN’s spanning

 

tree.

tcn BPDU’s xmitted

Number of topology change notification (TCN) BDPUs transmitted on this port.

 

 

tcn BPDU’s received

Number of TCN BPDUs received on this port.

 

 

forward transition count

Number of times the port state transitioned to the forwarding state.

 

 

scp failure count

Number of service control point (SCP) failures.

 

 

root inc trans count

Number of times the root bridge changed.

 

 

inhibit loopguard

State of the loop guard. In the current release, the state is always FALSE.

 

 

loop inc trans count

Number of loops that have occurred.

 

 

forward delay timer

Status of the forwarding delay timer. This timer monitors the time spent by a port in

the listening and learning states.

 

 

 

forward delay timer value

Current value of the forwarding delay timer, in seconds.

 

 

message age timer

Status of the message age timer. This timer measures the age of the received

protocol information recorded for a port.

 

message age timer value

Current value of the message age timer, in seconds.

 

Status of the topology change timer. This timer determines the time period during

topology change timer

which configured BPDUs are transmitted with the topology change flag set by this

 

switch when it is the root bridge, after detection of a topology change.

 

 

topology change timer value

Current value of the topology change timer, in seconds.

 

 

hold timer

Status of the hold timer. This timer ensures that configured BPDUs are not

transmitted too frequently through any bridge port.

 

hold timer value

Current value of the hold timer, in seconds.

delay root port timer

Status of the delay root port timer, which enables fast convergence when uplink

fast convergence is enabled.

 

delay root port timer value

Current value of the delay root port timer.

 

 

delay root port timer restarted is

Whether the delay root port timer has been restarted.

 

 

spanning tree type

Type of spanning tree. The type is always IEEE.

 

 

spanning tree multicast address

Destination address used to send out configured BPDUs on a bridge port.

 

 

bridge priority

STP priority of this switch.

 

 

bridge MAC address

MAC address of this switch.

 

 

bridge hello time

Value of the hello timer interval, in seconds, when this switch is the root or is

attempting to become the root.

 

 

 

 

 

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