METHOD OF IMPLEMENTING VIRTUAL LOCAL AREA NETWORKS ON ELELCTRICAL NETWORK COMMUNICATION SYSTEMS

摘要

The invention relates to a method of implementing virtual local area networks on electrical network communication systems, which can be used to support the 802.1q standard for virtual networks (VLAN) and one or more levels of independent proprietary virtual area network (OVLAN) without any interference between the two types. The inventive method can also support hierarchical structures. For said purpose, the inventive method comprises the following steps consisting in: assigning an OVLAN identification label (3) for each level thereof; including the aforementioned labels (3) in the frames in an external and transparent manner; including labels (3) in the unlabelled frames and comparing said labels with the list of permitted and forbidden labels of the output interface of the equipment; and including a special identification label which, when detected by the equipment, causes same to transmit the frame directly in order to provide addressable hierarchical structures.