Enterasys Networks 9034313-07 manual Clear spantree spanguard

clear spantree spanguard

Mode

Switch command, read‐write.

Usage

SpanGuard is designed to disable, or lock out an “edge” port when an unexpected BPDU is received. The port can be configured to be re‐enabled after a set time period, or only after manual intervention.

A port can be defined as an edge (user) port using the set spantree adminedge command, described in “set spantree adminedge” on page 9‐40. A port designated as an edge port is expected to be connected to a workstation or other end‐user type of device, and not to another switch in the network. When SpanGuard is enabled, if a non‐loopback BPDU is received on an edge port, the Spanning Tree state of that port will be changed to “blocking” and will no longer forward traffic. The port will remain disabled until the amount of time defined by set spantree spanguardtimeout (“set spantree spanguardtimeout” on page 9‐27) has passed since the last seen BPDU, the port is manually unlocked (set or clear spantree spanguardlock, “clear / set spantree spanguardlock” on page 9‐29), the configuration of the port is changed so it is not longer an edge port, or the SpanGuard function is disabled.

SpanGuard is enabled and disabled only on a global basis (across the stack, if applicable). By default, SpanGuard is disabled and SpanGuard traps are enabled.

Example

This example shows how to enable the SpanGuard function:

C3(rw)->set spantree spanguard enable

clear spantree spanguard

Use this command to reset the status of the Spanning Tree SpanGuard function to disabled.

Syntax

clear spantree spanguard

Parameters

None.

Defaults

None.

Mode

Switch command, read‐write.

Example

This example shows how to reset the status of the SpanGuard function to disabled:

C3(rw)->clear spantree spanguard

9-26 Spanning Tree Configuration