Information About The Catalyst Switch Configuration; Configuring The Catalyst Switches - Cisco Router IOS XR Getting Started Manual

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

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.
Configure the primary Catalyst switch with priority 0 to make the switch the root of the network.
Note
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:
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OL-10957-02
configure
spanning-tree portfast default
spanning-tree mode mst
spanning-tree mst configuration
name mst_region
revision number
instance instance_id vlan range
end
spanning-tree mst hello-time seconds
spanning-tree mst forward-time seconds
spanning-tree mst max-age seconds
spanning-tree mst max-hops hops
spanning-tree mst instance_id priority priority
udld aggressive
udld message time interval
interface gigabitethernet slot/port
switchport
switchport mode access
Configuring the External Cisco Catalyst 6509 Switches
Cisco IOS XR Getting Started Guide
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