Cisco Systems PA-POS-1OC3, PA-POS-2OC3 manual Configuring APS, 4-11, 1 Basic APS Configuration

Chapter 4 Configuring the PA-POS-1OC3

Customizing the Configuration

Step 3 To disable SONET payload scrambling, use the no pos scramble-atmcommand.

Router(config)# interface pos 3/0

Router(config-if)# no pos scramble-atm

Configuring APS

The following example shows the configuration of automatic protection switching (APS) on router A and router B. (See Figure 4-1.) In this example, router A is configured with the working interface, and router B is configured with the protect interface. If the working interface on router A becomes unavailable, the connection will automatically switch over to the protect interface on router B.

Figure 4-1 Basic APS Configuration

POS 2/0/0

Working interface

Router A

E 0/0

	E 0/0	POS 3/0/0
Router B		Protect interface

SONET network equipment

10325

Add Drop Multiplexer (ADM)

On router A, which contains the working interface, use the following configuration:

Router# configure terminal

Router(config)# interface loopback 1

Router(config-if)#ip address 10.7.7.7 255.255.255.0

Router(config)# interface pos 2/0/0

Router(config-if)# aps group 1

Router(config-if)# aps working 1

Router(config-if)# pos ais-shut

Router(config-if)# end

Router#

On router B, which contains the protect interface, use the following configuration:

Router# configure terminal

Router(config)# interface loopback 2

Router(config-if)#ip address 10.7.7.6 255.255.255.0

Router(config)# interface pos 3/0/0

Router(config-if)# aps group 1

Router(config-if)#aps protect 1 10.7.7.7

Router(config-if)# pos ais-shut

Router(config-if)# end

Router#

Note The loopback interface is used as the interconnect. The aps group command is used even when a single protect group is configured.

To verify the configuration or to determine if a switchover has occurred, use the show aps command.

PA-POS-1OC3 Single-Port Port Adapter Installation and Configuration Guide

OL-6514-04 4-11