Use this command to display Spanning Tree debug counters for one or more ports.
| port port-string | (Optional) Displays debug counters for specific port(s). For a detailed description of possible port-string values, refer to Port String Syntax Used in the CLI in the S-, K-, and 7100 Series Configuration Guide. |
| sid sid | (Optional) Displays the debug counters for a specific Spanning Tree identifier. Valid values are 0 - 4094. If not specified, SID 0 is assumed. |
| active | (Optional) Displays only the debug counters for ports that have received at least one configuration or RSTP BPDU. |
All command modes.
This example shows how to display Spanning Tree debug counters for link aggregation port 1, SID 0:
System(rw)->show spantree debug port lag.0.1 SID: 0, Bridge ID: 80-00-00-01-f4-5b-5e-8f, Time Since TC: 00 days 00:42:49 Root Priority Vector ------------------------------------------------------------ Root ID - 40-00-00-e0-63-93-74-a7 External Cost - 66666 Regional Root ID - 80-00-00-01-f4-5b-5e-8f Internal Cost - 0 Designated Bridge ID - 40-00-00-e0-63-93-74-a7 Designated Port - 8700 Receive Port - 8002 (lag.0.1) Alternate Ports Designated Bridge ------------------------------------------------------------ (none) Ports with Received TC BPDUs Count ------------------------------------------------------------ lag.0.1 2 ge.4.10 4 Ports with Message Age Expired Count ------------------------------------------------------------ (none) Ports with Exceptional Condition Reason ------------------------------------------------------------ (none) STP Diagnostic Common Counters ------------------------------------------------------------ Topology Change Count - 2 Message Expiration Count - 0 Invalid BPDU Count - 0 Disputed BPDU Count - 0 STP BPDU Rx Count - 0 STP BPDU Tx Count - 0 STP TCN BPDU Rx Count - 0 STP TCN BPDU Tx Count - 0 STP TC BPDU Rx Count - 0 STP TC BPDU Tx Count - 0 RST BPDU Rx Count - 0 RST BPDU Tx Count - 0 RST TC BPDU Rx Count - 0 RST TC BPDU Tx Count - 0 MST BPDU Rx Count - 2582 MST BPDU Tx Count - 2592 MST CIST TC BPDU Rx Count - 6 MST CIST TC BPDU Tx Count - 6 STP Diagnostic Root History Table for SID 0 ------------------------------------------------------------ Index Root Bridge ID Date Time ------------------------------------------------------------ 01 40-00-00-e0-63-93-74-a7 07-07-2009, 09:50:56 02 00-00-00-00-00-00-00-00 07-07-2009, 09:50:19 STP Port Data for SID 0 Port lag.0.1 ------------------------------------------------------------ Role - root State - forwarding NonFwd Reason - none Edge Port - false Boundary Port - true Root ID - 40-00-00-e0-63-93-74-a7 External Cost - 0 Regional Root ID - 40-00-00-e0-63-93-74-a7 Internal Cost - 0 Designated Bridge ID - 40-00-00-e0-63-93-74-a7 Designated Port - 8700 Port Id - 8002 Forward Transitions Count - 1 STP Diagnostic Port Counters for SID 0 Port lag.0.1 ------------------------------------------------------------ Message Expiration Count - 0 Invalid BPDU Count - 0 Disputed BPDU Count - 0 STP BPDU Rx Count - 0 STP BPDU Tx Count - 0 STP TCN BPDU Rx Count - 0 STP TCN BPDU Tx Count - 0 STP TC BPDU Rx Count - 0 STP TC BPDU Tx Count - 0 RST BPDU Rx Count - 0 RST BPDU Tx Count - 0 RST TC BPDU Rx Count - 0 RST TC BPDU Tx Count - 0 MST BPDU Rx Count - 1287 MST BPDU Tx Count - 4 MST CIST TC BPDU Rx Count - 2 MST CIST TC BPDU Tx Count - 2
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