Cisco Systems BC-281 manual BC-332, DLSw+ with Ethernet Redundancy in a Switched Environment

Configuring Data-Link Switching Plus

DLSw+ Configuration Examples

dlsw remote-peer 0 tcp 10.1.17.1 interface loopback 0

ip address 10.2.24.3 255.255.255.0

int e1

ip address 150.150.2.2 255.255.255.0

dlsw transparent redundancy-enable 9999.9999.9999 master priority 1 dlsw transparent timers sna 1500

Router C

dlsw local-peer peer-id 10.2.24.4 dlsw remote-peer 0 tcp 10.2.17.1 interface loopback 0

ip address 10.2.24.4 255.255.255.0

int e1

ip address 150.150.2.3 255.255.255.0

dlsw transparent redundancy-enable 9999.9999.9999

Router D

dlsw local-peer peer-id 10.2.17.1 promiscuous

DLSw+ with Ethernet Redundancy Enabled for Switch Support Configuration Example

Figure 145 is a sample configuration of the DLSw+ Ethernet Redundancy feature in a switched environment. The ethernet switch sees the device with MAC address 4000.0010.0001 one port at a time because Router A and Router B have mapped different MAC addresses to it. This configuration is known as MAC-address mapping. Router A is configured so that MAC address 4000.0001.0000 maps to the actual device with MAC address 4000.0010.0001. Router B is configured so that MAC address 4000.0201.0001 maps to the actual device with MAC address 4000.0010.0001. Router A and B backup one another. Router A is configured as the master with a default priority of 100. Master Router A waits

1.5seconds after it receives the first IWANTIT primitive before assigning the new SNA circuit to one of its ethernet redundancy peers because of the dlsw transparent timers sna 1500 command.

Figure 145 DLSw+ with Ethernet Redundancy in a Switched Environment

Workstation Z

Workstation X Router A

4000.0010.0001

Workstation Y	Router B
	Ethernet switch

17956

	Cisco IOS Bridging and IBM Networking Configuration Guide
BC-332	78-11737-02