The l2tp calling-station-id vlan-0-invalid command sets the invalid VLAN ID to 0 in the calling station ID that the L2TP user (LAC) sends to the LNS.
The undo l2tp calling-station-id command restores the default invalid VLAN ID, 4096.
By default, the invalid VLAN ID is 4096.
This command is supported only on the NetEngine 8000 F1A.