Foundry Networks Switch and Router Installation And Configuration Manual page 193

Using Packet Over SONET (POS) Modules
interface. This communication takes place on a channel independent of the working and protect interfaces
themselves.
You can specify an authentication string that must be part of each packet sent between the process controlling the
working interface and the process controlling the protect interface. To do so, enter commands such as the
following:
BigIronA(config)# interface pos 2/1
BigIronA(config-posif-2/1)# aps working 1
BigIronA(config-posif-2/1)# aps authenticate mulvaney
BigIronA(config-posif-2/1)# exit
BigIronB(config)# interface pos 3/1
BigIronB(config-posif-3/1)# aps protect 1 10.0.0.1
BigIronB(config-posif-3/1)# aps authenticate mulvaney
BigIronB(config-posif-3/1)# exit
NOTE: The same authentication string must be configured on both the working and protect interfaces.
Syntax: aps authenticate <string>
Forcing an APS Switchover
You can manually force a protect interface to take over as a working interface by entering the aps force command
on the protect interface. This command is useful when you want to bring down a working interface for
maintenance purposes.
For example:
BigIron(config)# interface pos 3/1
BigIron(config-posif-3/1)# aps protect 1 10.0.0.1
BigIron(config-posif-3/1)# aps force 1
BigIron(config-posif-3/1)# exit
Syntax: aps force <circuit-number>
The <circuit-number> is a valid POS APS circuit number. In addition, you can specify 0 as the <circuit-number>
(aps force 0) to manually force traffic from the protect interface to the working interface.
The switchover takes place immediately after you enter the command. The aps force command is not saved if
you write the active configuration to memory.
Preventing an APS Switchover
You can prevent a protect interface from taking over from a working interface by using the aps lockout command.
If the working interface malfunctions, no switchover to the protect interface takes place.
To prevent a protect interface from becoming a working interface, enter commands such as the following on the
protect interface:
BigIron(config)# interface pos 3/1
BigIron(config-posif-3/1)# aps protect 1 10.0.0.1
BigIron(config-posif-3/1)# aps lockout 1
BigIron(config-posif-3/1)# exit
Syntax: aps lockout <circuit-number>
Manually Causing an APS Switchover
To manually cause a switchover from a working interface to a protect interface, use the aps manual command.
This command can be used when you want to bring a working interface down for maintenance, or if want to bring
an interface back up without waiting for the WTR (wait-to-restore) interval specified by the aps revert command.
For example, to cause traffic on a working interface to switch over to the protect interface, enter commands such
as the following:
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