This object indicates the mode of VLAN handling between the port or the virtual port associated with the PW and the PW encapsulation. - 'other' indicates an operation that is not defined by this MIB module. - 'portBased' indicates that the forwarder will forward packets between the port and the PW independent of their structure (i.e. there is no service delimiting VLAN tags from the PE standpoint). - 'noChange' indicates that the PW contains the original user VLAN, as specified in pwEnetPortVlan, i.e. the VLAN on the PE-CE link is the service delimiting tag and is kept 'as is' on the PW. - 'changeVlan' indicates that the VLAN field on the PW may be different than the VLAN field on the user's port. The VLAN on the PE-CE link is the service delimiting tag but has a different value on the PW. - 'removeVlan' indicates that the encapsulation on the PW does not include the service delimiting VLAN field. Note that PRI bits transparency is lost in this case. - 'addVlan' indicates that a VLAN field will be added on the PSN bound direction (i.e. on the PW). pwEnetPwVlan indicates the value that will be added. - Implementation of 'portsbased', 'removeVlan', 'addVlan' 'other' and 'changeVlan' is OPTIONAL.