Verifying The Spanning Tree - Cisco Router IOS XR Getting Started Manual

Chapter 3 Bringing Up the Cisco IOS XR Software on a Multishelf System
Command or Action
Step 5 On the external Catalyst switches, verify that the links
are not unidirectional.
Step 6
exit
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.
2.
3.
DETAILED STEPS
Command or Action
Step 1
admin
Example:
RP/0/RP0/CPU0:router# admin
OL-10957-02
admin
show platform
show spantree mst 1 detail location rack/slot/cpu0
Purpose
Verifies that the links from the chassis to the external
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
The verification commands must be entered from a
terminal directly connected to the external Catalyst
switches, using Cisco IOS CLI commands.
Exits administration EXEC mode and returns to EXEC
mode.
Purpose
Places the router in administration EXEC mode.
All commands listed in this procedure should be
•
entered on the pre-existing single-chassis system.
Cisco IOS XR Getting Started Guide
Verifying the Spanning Tree
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