Usage Scenario
The track admin-vsi command applies only to LDP VPLS. You must run the pwsignal and vsi-id commands before running the track admin-vsi command.
The
track admin-vsi command can be used only in the service VSI.
A service VSI can be bound only to one mVSI.
To prevent the service VSI from encountering routing loops in an STP over PW scenario, run this command.