Configuring Nonrevertive Or Revertive Mode - Extreme Networks PoS Installation And User Manual

Configuring the PoS Module

Configuring Nonrevertive or Revertive Mode

You can configure the APS action that should be taken when traffic is active on the
protection line and the working line becomes operational.
The default switching mode is nonrevertive switching, which means traffic remains on
the protection line until either manual intervention or a failure on the protection line
forces a switch back to the working line.
If you configure revertive switching mode on an APS group, traffic is switched
automatically from the protection line to the working line after the user-defined
Wait-To-Restore (WTR) period. The WTR period minimizes frequent switching due to
intermittent errors on the working line by restoring service only when no errors are
detected on the working line during the WTR period.
A longer WTR period provides more protection against frequent switching by
waiting to assure that the working line is fully operational, but prolongs the time it
takes to restore traffic to the working line after it is fully operational.
To configure APS operation in either nonrevertive or revertive switching mode, use the
following command:
config aps <group#> [nonrevert | revert <minutes>]
The parameter is an integer in the range from 1 to 65535 that identifies the APS
group#
group to which the configuration command applies.
The parameter is an integer in the range from 0 to 12. If you select revertive
minutes
switching mode, you must enter a value for
This command applies only to SONET ports performing the protection line
function.
The following command example configures APS group 1001 to operate in revertive
switching mode, with a WTR of 5 minutes.
config aps 1001 revert 5
3-90
.
minutes
Packet Over SONET Module Installation and User Guide