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Catalyst 6500 Series Switch Command Reference—Release 7.6
78-15328-01
Chapter 2 Catalyst 6500 Series Switch and ROM Monitor Commands
show spantree statistics
Related Commands clear spantree statistics
show spantree
bridge forward delay Value of the Forward Delay parameter when the bridge is the root or is attempting to become the
root.
topology change
initiator:
Number of the port that caused the topology change.
topology change Boolean parameter set to record the value of the topology change flag in config BPDUs to be
transmitted by the bridge on LANs for which the bridge is the designated bridge.
topology change time Time period for which BPDUs are transmitted with the topology change flag set by the bridge
when it is the root following the detection of a topology change. It is equal to the sum of the
bridge’s Max Age and Forward Delay parameters.
topology change
detected
Boolean parameter set to TRUE when a topology change has been detected by or notified to the
bridge.
topology change count Number of times the topology change has occurred.
topology change last
recvd. from
MAC address of the bridge that transmitted the last TCN BPDU.
Other port-specific info
dynamic max age
transitions
Number of dynamic max age transitions.
port bpdu ok count Number of reported port BPDU counts.
msg age expiry count Number of message age expires.
link loading Status of whether the link is oversubscribed.
bpdu in processing Status of whether the BPDU is under processing.
num of similar bpdus to
process
Number of similar BPDUs to process that are received on a specific port.
received_inferior_bpdu Status of whether the port received an inferior BPDU or in response to an RLQ BPDU.
next state Port state before it is actually set by spanning tree, to faciliate other tasks in using the new value.
src mac count: Number of BPDUs with the same source MAC address.
total src mac count Number of BPDUs with all the source MAC addresses.
curr_src_mac Source MAC address of the configured BPDU received on a particular port. It should always be
set to NULL for the Catalyst 6500 series switches.
next_src_mac MAC address from the different source. It should always be set to NULL for the Catalyst 6500
series switches.
channel_src_mac Source MAC address of the channel port. It is used to detect channel misconfiguration and avoid
spanning tree loops.
channel src count Number of times channel_src_mac gets changed and if the limit is exceeded, a channel
misconfiguration is detected.
channel ok count Number of times the channel ok condition was detected.
Table 2-90 show spantree statistics Command Output Fields (continued)
Field Description
