Users Guide

Common STP commands
This section explains about the common commands in STP. STP variant specific commands are explained in the individual
sections under RSTP, MSTP, and Rapid-PVST.
There are two sets of STP related commands.
● STP commands that are common and can be used irrespective of the STP variant enabled on the device.
● STP commands that are specific to the particular STP variant.
clear spanning-tree counters
Clears the counters for STP.
Syntax
clear spanning-tree counters [interface {ethernet node/slot/port[:subport]
| port—channel number}}]
Parameters
● interface — Enter the interface type:
○ ethernet node/slot/port[:subport] — Deletes the spanning-tree counters from a
physical port.
○ port-channel number — Deletes the spanning-tree counters for a port-channel interface,
from 1 to 128.
Default Not configured
Command Mode EXEC
Usage
Information
Clear all STP counters on the device per the Ethernet interface or port-channel.
Example
OS10# clear spanning-tree counters interface port-channel 10
Supported
Releases
10.2.0E or later
debug spanning-tree
Enables STP to debug and display protocol information.
Syntax
debug spanning-tree {all | bpdu [tx | rx] | events}
Parameters
● all — Debugs all spanning-tree operations.
● bpdu — Enter transmit (tx) or receive (rx) to enable the debug direction.
● events — Debugs STP events.
Default Not configured
Command Mode EXEC
Usage
Information
None
Example
OS10# debug spanning-tree bpdu rx
Supported
Releases
10.5.0 or later
errdisable detect cause bpduguard
Configures the port to be shut down or moves the port to blocked state on detecting a BPDU guard violation.
Syntax
errdisable detect cause bpduguard
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