To modify the range of VLANs on an access port that are to be managed by an existing management VPLS, the new range should be defined, then the old range is removed. If the old range is removed before a new range is defined, all customer VPLS services in the old range become unprotected and may be disabled.
CLI syntax:
config>service# vpls service-id
sap sap-id
managed-vlan-list
[no] range vlan-range