APS

Automatic protection switching (APS) packets help the source and sink on a channel perform protection switching, switching hold-off, and wait to restore (WTR) functions in case of bidirectional protection switching. By always transmitting APS packets along the protection channel, the source and sink exchange their switching status and implement switching simultaneously once the working channel fails.

Navigation Path

In the NE Explorer, select an NE and choose Configuration > Packet Configuration > MPLS Management > MPLS-TP Shared Protection Ring Management from the Function Tree, click the APS tab.

Parameters

**Table 1** Descriptions of the parameters for MPLS-TP shared protection ring management
Field	Value	Description
APS Status (East)	Enabled, Disabled	Indicates the APS status on the east channel.
APS Status (West)	Enabled, Disabled	Indicates the APS status on the west channel.
WTR Time(min)	1 to 12	Indicates the time elapsed after the working channel is restored to normal and before traffic is switched from the protection channel back to the working channel. Setting the WTR prevents frequent switching between the working and protection channels when the working channel is unstable after restoration in some scenarios.
Hold-off Time(100ms)	0 to 100	Indicates the duration from fault detection to protection switching.