KB.15.15

Example 124 Viewing debug counters for a specific VLAN

HP Switch(config)#: show spanning-tree debug vlan 20

Status and Counters - RPVST Debug Counters Information

VLAN ID : 20

Aggregated Value

Counter Name Collected from Ports

------------------------------ --------------------

Invalid BPDUs 5

Errant BPDUs 10

Looped-back BPDUs 0

Starved BPDUs 9

Exceeded Max Age BPDUs 2

Topology Changes Detected 9

Topology Changes Tx 4

Topology Changes Rx 181

Topology Change ACKs Tx 0

Topology Change ACKs Rx 0

TCN BPDUs Tx 0

TCN BPDUs Rx 0

CFG BPDUs Tx 0

CFG BPDUs Rx 0

RST BPDUs Tx 0

RST BPDUs Rx 0

RPVST BPDUs Tx 1531

RPVST BPDUs Rx 1428

Viewing debug counters per-port per-VLAN

Syntax:

show spanning-tree debug ports port-list vlan vlan-id

Displays the aggregate values of all RPVST+ debug counters maintained on one or

more ports used by a specified VLAN.

Troubleshooting an RPVST+ configuration 159