Case 1—Enable Tag Switching Incrementally in a Network

In the first case, assume that you want to deploy Tag Switching incrementally throughout a network of routers, but that you do not want to restrict which destination prefixes are tag switched. For a description of the commands listed in these cases, see Chapter 11, "Tag Switching Commands."

To enable Tag Switching incrementally in a network, perform these steps and enter the commands in router configuration mode (refer to Figure 10-1):

Step Command Purpose
1 At R1:
Router# configuration terminal
Router(config)# ip cef distributed
Router(config)# tag-switching advertise-tags
Router(config)# interface e0/1
Router(config-if)# tag-switching ip
Router(config-if)# exit
At R3:
 Router# ...

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