You can shut down the VPG in two ways—forced or graceful:
Forced—The VPG immediately removes all gates and
disconnects from the PGC. The packet gateway does not attempt to establish
a new connection.
Graceful—The VPG goes out of service by entering
a draining mode and waiting for all terminations to be subtracted
before going out of service. During the draining, the VPG accepts
only subtract and audit commands from the PGC.
