User guide

Packet Over SONET Module Installation and User Guide 3-93
Configuring and Monitoring APS Functions
The working keyword forces the specified APS group to use the working line as the
active line. The
protection keyword forces the specified APS group to use the
protection line as the active line.
A forced switch is a high priority request. Only three events can override a forced
switch request:
• A
config aps force off command
• A
config aps lockout on command (that was either in effect before the force
command or issued after the force command)
• A Signal Fail condition detected on the protection line
This command applies only to SONET ports performing the protection line
function. Also, the settings from this command are not preserved when the
switch reboots.
The following command example forces APS group 1001 to use the protection line as
the active line:
config aps 1001 force protection
Configuring Manual Switch Mode
You can manually determine whether an APS group uses its working line as the active
line, or uses its protection line as the active line. One potential use of this capability is to
perform a manual switch back to the working line after an error condition has cleared
without waiting for the full Wait-To-Restore period to elapse.
To manually determine whether an APS group uses its working line or its protection
line as the active line, use the following command:
config aps <group#> manual [off | working | protection]
The group# parameter is an integer in the range from 1 to 65535 that identifies the APS
group to which the command applies.
The
off keyword turns off manual switch mode. By default, manual switch mode is off.
The
working keyword causes the specified APS group to use the working line as the
active line. The
protection keyword causes the specified APS group to use the
protection line as the active line.