Nortel Networks 2300 Series manual Output for show spantree statistics

420STP Commands

Table 4: Output for show spantree statistics (continued)

Field	Description
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.
top_change_ack	Value of the topology change acknowledgment flag in the
	next configured bridge 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.
config BPDU’s xmitted	Number of BPDUs transmitted from the port. A number in
	parentheses indicates the number of configured BPDUs
	transmitted by the WSS for this VLAN’s spanning tree.
config BPDU’s received	Number of BPDUs received by this port. A number in
	parentheses indicates the number of configured BPDUs
	received by the WSS 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.
topology change timer	Status of the topology change timer. This timer determines
	the time period during which configured BPDUs are
	transmitted with the topology change flag set by this WSS
	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.

NN47250-100 (Version 02.51)