Cisco IOS Cookbook, 2nd Edition

Using DLSw to Bridge Between Ethernet and Token Ring

Problem

You want to set up DLSw to allow Token Ring to Ethernet bridging.

Solution

DLSw includes the capability to bridge different kinds of media. One common example of this is bridging an Ethernet segment to a Token Ring. In this example, we will suppose that we are connecting an Ethernet branch to the same central Token Ring DLSw router from Recipe 15.2:

dlsw-ether-branch#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
dlsw-ether-branch(config)#interface Loopback0
dlsw-ether-branch(config-if)#ip address 10.1.3.5 255.255.255.252
dlsw-ether-branch(config-if)#exit
dlsw-ether-branch(config)#access-list 200 permit 0x0000 0x0D0D
dlsw-ether-branch(config)#source-bridge ring-group 101
dlsw-ether-branch(config)#dlsw local-peer peer-id 10.1.3.5
dlsw-ether-branch(config)#dlsw timer explorer-wait-time 5
dlsw-ether-branch(config)#dlsw remote-peer 0 tcp 10.1.1.5 lf 1470 lsap-output-list 200
dlsw-ether-branch(config)#dlsw bridge-group 1
dlsw-ether-branch(config)#dlsw transparent switch-support
dlsw-ether-branch(config)#dlsw allroute-sna
dlsw-ether-branch(config)#interface Ethernet0
dlsw-ether-branch(config-if)#description branch Ethernet
dlsw-ether-branch(config-if)#bridge-group 1
dlsw-ether-branch(config-if)#bridge 1 protocol ieee
dlsw-ether-branch(config-if)#exit
dlsw-ether-branch(config)#end
dlsw-ether-branch#

Discussion

Before looking at this in detail, we need to stress that routable protocols such as TCP/IP ...