Network Router User's Manual

Configuring Tag Switching on an ATM Switch Router

ATMSwitch Router Quick Software Configuration Guide5-2

Configuring Tag Switching on an ATM Switch Router

This section describes how to configure tag switching on an ATM switch router, and

includes the following procedures:

• Enabling Tag Switching on the ATM Interface

• Configuring the Routing Protocol

Enabling Tag Switching on the ATM Interface

Note Configure all parallel interfaces between switches for either IP unnumbered or with

a specific IP address. Unnumbering some parallel interfaces and assigning specific IP

addresses to others might cause Tag Distribution Protocol (TDP) sessions to restart on some

parallel interfaces when another parallel interface is shut down. Therefore, we highly

recommend that you unnumber all parallel interfaces to loopback.

Take these steps:

Step Command Purpose

1 Switch(config)# interface atm

card/subcard/port

Switch(config-if)#

Enter interface configuration mode on the

specified ATM interface.

2 Switch(config-if)# ip unnumbered

type number

Enable IP unnumbered on the ATM

interface and assign the unnumbered

interface to an interface that has an IP

address. We recommend enabling IP

unnumbered because it allows you to

conserve IP addresses and reduces the

number of TVCs

terminating on the

switch.

or or

Switch(config-if)# ip address

ip-address mask

Assign an IP address and subnet mask to

the ATM interface.