Cisco Systems Cisco IOS XR manual Verifying the Spanning Tree

Chapter 3 Bringing Up the Cisco IOS XR Software on a Multishelf System

Verifying the Spanning Tree

	Command or Action	Purpose
Step 5 On the external Catalyst switches, verify that the links		Verifies that the links from the chassis to the external
	are not unidirectional.	Catalyst switches are operating correctly.
		• If a unidirectional link is present, a loop may occur.
		• For instructions to verify the Catalyst links, see the
		“Verifying the Catalyst Switch” section on page 3-18.
		The verification commands must be entered from a
		terminal directly connected to the external Catalyst
		switches, using Cisco IOS CLI commands.
Step 6 exit		Exits administration EXEC mode and returns to EXEC
		mode.

Example:

RP/0/RP0/CPU0:router(admin)# exit

RP/0/RP0/CPU0:router#

Verifying the Spanning Tree

When both LCCs and all FCCs are up and running, it is time to verify the spanning tree on the control network as described in the following procedure.

SUMMARY STEPS

1.admin

2.show platform

3.show spantree mst 1 detail location rack/slot/cpu0

DETAILED STEPS

	Command or Action	Purpose
Step 1 admin		Places the router in administration EXEC mode.
		• All commands listed in this procedure should be
	Example:	entered on the pre-existing single-chassis system.
	RP/0/RP0/CPU0:router# admin

	Cisco IOS XR Getting Started Guide
OL-10957-02		3-39