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Cisco ONS 15530 Configuration Guide and Command Reference
78-14227-01, Cisco IOS Release 12.1(10)EV2
Chapter7 Configuring APS
About Switchovers and Lockouts

Displaying the Switchover-Enable Timer Configuration

To display the switchover-enable timer configuration, use the following EXEC command:
Example
The following example shows how to display the path switching configuration for an APS group named
blue:
Switch# show aps group blue
APS Group blue:
architecture.: 1+1, remote prov: 1+1
span.........: end-to-end
direction....: prov: bi, current: bi, remote prov: bi
revertive....: yes
msg-channel..: auto (up on osc)
created......: 26 minutes
aps state....: associated
request timer: holddown: 5000 ms, max: 15 secs, count 2
transmit k1k2: reverse-request, 1, 1, 1+1, bi
receive k1k2: forced-switch, 1, 1, 1+1, bi
switched chan: 0
channel ( 0): Wavepatch8/0/1 (STANDBY - UP)
: channel request: no-request
: transmit request: no-request
: receive request: no-request
channel ( 1): Wavepatch8/0/0 (ACTIVE - UP)
: channel request: no-request
: switchover count: 0
: last switchover: never
About Switchovers and Lockouts
In APS, you can switch a channel signal from one path to a nothe r, or you ca n loc k o ut a s wit chover
altogether while performing system maintenance.
A switchover of the channel signal from the working path to protection path is useful when upgrading
or maintaining the system, or in cases where a signal failure caused a switchover. The switchover to the
formerly failed interface must be requested from the CLI. The interface originally configured as the
working path might be preferred because of its link loss characteristics or because of its distance
advantage. For example, some protocols, such as ESCON, experience lower data throughput at
increasing distances, so moving the signal back to the shorter path might be advised.
A lockout prevents a switchover of the active signal from the working path to the protection path. This
is useful when upgrading or maintaining the system, or repa iri ng t he p rot ecti on pat h when it d egrade s
or fails.
Command Purpose
show aps [detail | group name |
interface{transparent slot/subcard/0 |
wavepatchslot/subcard/port |
waveethernetphy slot/subcard/0 |
gigethernetphy slot/subcard/0}]
Displays the APS configuration for interfaces and
groups.
Note Group names are case sensitive.