Foundry Networks Switch and Router Installation And Configuration Manual page 190

Foundry Switch and Router Installation and Configuration Guide
In this configuration, the ADM sends identical traffic through the working interface on BigIronA and the protect
interface on BigIronB. If the working interface malfunctions (that is, experiences high bit error ratios (BERs),
significant signal degradation, or signal failure) or is taken down manually, the protect interface automatically
takes over.
The following commands configure the working interface on BigIronA:
NOTE: Foundry Networks recommends that you configure the working interface prior to configuring the protect
interface, so that the protect interface does not inadvertently become the working interface.
BigIronA(config)# interface loopback 1
BigIronA(config-lbif-1)# ip address 10.0.0.1/24
BigIronA(config-lbif-1)# exit
BigIronA(config)# interface pos 2/1
BigIronA(config-posif-2/1)# aps working 1
BigIronA(config-posif-2/1)# exit
Syntax: aps working <circuit-number>
The aps working command establishes this interface as the working interface in circuit 1. This working interface
corresponds to a protect interface on the BigIronB.
The following commands configure the protect interface on BigIronB:
BigIronB(config)# interface loopback 2
BigIronB(config-lbif-2)# ip address 10.0.0.2/24
BigIronB(config-lbif-2)# exit
BigIronB(config)# interface pos 3/1
BigIronB(config-posif-3/1)# aps group 1
BigIronB(config-posif-3/1)# aps protect 1 10.0.0.1
BigIronB(config-posif-3/1)# exit
Syntax: aps protect <circuit-number> <ip-addr>
The aps protect command specifies the circuit this interface is protecting, as well as the IP address of the router
where the working interface resides. This is normally the loopback address of the router. If the device is a switch,
this is the management IP address.
Multi-Group APS Configuration
A router can have more than one protect or working interface. To configure more than one protect or working
interface on a router, you assign each interface to a group using the aps group command. Figure 6.8 illustrates a
configuration with two APS working/protect circuit pairs.
6 - 28 December 2000