Cisco Router Cisco IOS XR User Manual

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Cisco IOS XR Getting Started Guide
OL-10957-02
Chapter 3 Bringing Up the Cisco IOS XR Software on a Multishelf System
Configuring the External Cisco Catalyst 6509 Switches
Information About the Catalyst Switch Configuration
The configuration described in the following sections places all Catalyst ports in VLAN 1. The
configuration on the Catalyst switches is the same as the configuration on the Cisco CRS-1 router
internal Broadcom switches—they all participate in a Multiple Spanning Tree (MST) region with one
MST instance.
The Catalyst switches are made the root of the network by assigning them the highest priority. Because
there are two Catalyst switches, one is selected as the root-bridge device. Configure the primary Catalyst
switch with priority 0 to make the switch the root of the network. Configure the second Catalyst switch
with a number greater than 0 and less than 32768. If the primary Catalyst switch (priority 0) fails, the
second switch becomes the root of the network.
Configuring the Catalyst Switches
The Cisco IOS software configuration must be applied to both external Catalyst switches.
Note Configure the primary Catalyst switch with priority 0 to make the switch the root of the network.
Configure the second Catalyst switch with a number greater than 0 and less than 32768. If the primary
Catalyst switch (priority 0) fails, the second switch becomes the root of the network.
To configure the Catalyst 6509 switches, use the following procedure:
SUMMARY STEPS
1. configure
2. spanning-tree portfast default
3. spanning-tree mode mst
4. spanning-tree mst configuration
5. name mst_region
6. revision number
7. instance instance_id vlan range
8. end
9. spanning-tree mst hello-time seconds
10. spanning-tree mst forward-time seconds
11. spanning-tree mst max-age seconds
12. spanning-tree mst max-hops hops
13. spanning-tree mst instance_id priority priority
14. udld aggressive
15. udld message time interval
16. interface gigabitethernet slot/port
17. switchport
18. switchport mode access

Cisco Router Cisco IOS XR Specifications

General

Brand	Cisco
Model	Router Cisco IOS XR
Category	Software
Language	English