Cisco Router IOS XR Getting Started Manual page 57

Chapter 3 Bringing Up the Cisco IOS XR Software on a Multishelf System
Configuring the External Cisco Catalyst 6509 Switches
The listed interfaces should include the port to which you have connected. If the port is not listed, contact
Cisco Technical Support. For contact information, see the "Obtaining Technical Assistance" section on
page xiv.
CAT6k-1# show spanning-tree
MST00
Spanning tree enabled protocol mstp
Root ID Priority 0
Address 0013.1a4f.75c0
This bridge is the root
Hello Time 1 sec Max Age 8 sec Forward Delay 6 sec
Bridge ID Priority 0 (priority 0 sys-id-ext 0)
Address 0013.1a4f.75c0
Hello Time 1 sec Max Age 8 sec Forward Delay 6 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Gi1/1 Desg FWD 20000 128.1 P2p
Gi1/2 Desg FWD 20000 128.2 P2p
Gi1/3 Desg FWD 20000 128.3 P2p
Gi1/4 Desg FWD 20000 128.4 P2p
Gi1/5 Desg FWD 20000 128.5 P2p
Gi1/6 Desg FWD 20000 128.6 P2p
MST01
Spanning tree enabled protocol mstp
Root ID Priority 1
Address 0013.1a4f.75c0
This bridge is the root
Hello Time 1 sec Max Age 8 sec Forward Delay 6 sec
Bridge ID Priority 1 (priority 0 sys-id-ext 1)
Address 0013.1a4f.75c0
Hello Time 1 sec Max Age 8 sec Forward Delay 6 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Gi1/1 Desg FWD 20000 128.1 P2p
Gi1/2 Desg FWD 20000 128.2 P2p
Gi1/3 Desg FWD 20000 128.3 P2p
Gi1/4 Desg FWD 20000 128.4 P2p
Gi1/5 Desg FWD 20000 128.5 P2p
Gi1/6 Desg FWD 20000 128.6 P2p
CAT6k-1#
Verify that the Links are Not Unidirectional
After an LCC or FCC is brought up, verify that the Catalyst links are operating correctly. If a link has a
partial fiber cut or a bad optic, the control Ethernet network can become unidirectional and cause a loop.
To verify the links in a Catalyst switch using the Cisco IOS software, enter the command show interface
in EXEC mode.
In the following example, the command is entered for a specific port. The keywords | inc Gig narrows
the output to Gigabit Ethernet ports.
Router# show interface gi 6/1 | inc Gig
GigabitEthernet6/1 is up, line protocol is up (connected)
Cisco IOS XR Getting Started Guide
3-19
OL-10957-02