show spantree nonforwardingreason

show spantree nonforwardingreason

Use this command to display the reason for placing a port in a non‐forwarding state due to an exceptional condition.

Syntax

show spantree nonforwardingreason port-string[sid sid]

Parameters

port‐string

Specifies port(s) for which to display the non‐forwarding reason.

sid sid

(Optional) Specifies the specific Spanning Tree(s) for which to display

 

the non‐forwarding reason. Valid values are 0 4094. If not specified,

 

SID 0 is assumed.

 

 

Defaults

If no port‐string is specified, non‐forwarding reason is displayed for all ports.

If no SID is specified, SID 0 is assumed.

Mode

Switch command, read‐only.

Usage

Exceptional conditions causing a port to be placed in listening or blocking state include a Loop Protect event, receipt of disputed BPDUs, and loopback detection.

Example

This example shows how to display the non‐forwarding reason on ge.1.1:

C3(rw)->show spantree nonforwardingreason port ge.1.1

The non-forwarding reason for port ge.1.1

on SID 0 is None

9-54 Spanning Tree Configuration

Page 324
Image 324
Enterasys Networks 9034313-07 manual Show spantree nonforwardingreason, Sid sid