Users Guide

Table Of Contents
Common STP commands
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 displays 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 PVST events.
Default Not configured
Command Mode EXEC
Usage Information None
Example
OS10# debug spanning-tree bpdu rx
Supported
Releases
10.2.0E 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
Parameters None
Default Enabled
Command Mode CONFIGURATION
Usage Information
This command applies only to STP-enabled ports. The command takes effect only when the BPDU guard is
configured on a port.
When the detect cause option is enabled, the port is shut down whenever there is a BPDU guard violation.
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