This object indicates the type of SVLAN classification that has to be used for a given type of port. providerNetworkPort / customerNetworkPort - Port's 'pvid' will be the SVLAN classification for the untagged packets received over this interface. customerEdgePort - The SVLAN classification mechanism is always based on 'cvlan' (i.e CVidRegistrationTable ).No other SVLAN classification mechanism is allowed for this port type. propCustomerNetworkPort / propCustomerEdgePort - 'pvid' will be default SVLAN classification mechanism for this port. But the user is free to configure any other SVLAN classification mechanism except the CVidRegistrationTable (ie cvlan mechanism) For proprietary CEP and proprietary CNP ports,the SVLAN classification is based on one of the configured SVLAN classification methods mentioned here. If it is not configured, by default the port's 'PVID' is considered as the SVLAN for untagged packets.