METHOD OF FORWARDING ETHERNET PACKETS IN TELECOMMUNICATION NETWORKS

摘要

A technique for forwarding Ethernet layer-2 frames in access and/or metro networks, wherein each frame carrying an overhead field OHF intended for VLAN ID. The OHF has total length of N bits and comprises a first VID sub-field (tag) and second VID sub-field (tag). The technique assumes that the two sub-fields of the OHF may have unequal sizes and therefore suggests to analyze the whole N-bit length of the OHF of each Ethernet layer-2 frame before the forwarding.