The vpls ignore-ac-state command prevents the status of a VSI from being affected by AC status changes.
The undo vpls ignore-ac-state command restores the default configuration.
By default, a service VSI can be Up only if at least one AC interface or UPE PW is Up.
Usage Scenario
Before the replacement of CEs, you can configure VSIs on UPEs to temporarily ignore the AC status check. Then, check whether VSIs on UPEs can work properly after new CEs are deployed. A VSI can be Up only if at least one AC interface or one UPE PW is Up. After you configure a VSI to ignore the AC status check, the VSI remains Up provided that; if one UPE PW is Up, regardless of whether the AC interface is Up or Down.
The AC status has two meanings:Follow-up Procedure
After service switching, run the undo vpls ignore-ac-state command to restore the default configuration.