A router and a switch

Need to configure your lab router to be a Frame Relay switch? Here are the steps.

Cisco routers can also be configured as a Frame Relay switch. This is very rarely used in a production network.

However, this feature is very useful in a lab environment. There are several steps to configuring your router to be a Frame Relay switch. First, enable Frame Relay switching entering the following command in global configuration mode:

frame-relay switching

Next, use the frame-relay route command on each of the interfaces that will be used to switch Frame Relay packets. The frame-relay route command maps one DLCI on an interface to another DLCI on another interface. The following configuration example maps DLCI 500 on Serial1/0 to DLCI 600 on interface Serial2/0 and vice versa.

interface Serial1/0

no ip address

encapsulation frame-relay

keepalive 15

frame-relay lmi-type ansi

frame-relay intf-type dce

frame-relay route 500 interface Serial2 600

interface Serial2/0

encapsulation frame-relay

keepalive 15

frame-relay intf-type dce

frame-relay route 600 interface Serial1 500

From Cisco Router Configuration and Troubleshooting, Second Edition, by Mark Tripod, published by New Riders, Indianapolis, Ind. For more information on Cisco Router Configuration and Troubleshooting, go to http://www.newriders.com/books/title.cfm?id=644 and http://www.informit.com/product/0735700249/.


This was first published in August 2000

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