Apparatus for and method for supporting 802.1Q VLAN tagging with independent VLAN learning in LAN emulation networks

摘要

An apparatus for and a method of extending the ATM Forum LAN Emulation standard to support 802.1Q VLAN tagging with Independent VLAN Learning. A standard LEC entity is modified to perform the VLAN tagging method that supports Independent VLAN Learning. Since the LES may also respond to LE_ARP messages, it is optionally modified to perform the VLAN tagging method of the invention so as to provide support for 802.1Q Independent VLAN Learning. Support for 802.1Q Independent VLAN Learning is provided by adding a VLAN-ID TLV to LAN Emulation control messages such as LE_ARP and LE_REGISTER messages. The TLV added comprises the VLAN Tag Header information that is normally carried by the Ethernet frame in 802.1Q networks.