TRAFFIC DIVISION FILTER Russian patent published in 2007 - IPC H04L29/12 H04L12/46 

FIELD: traffic division filter of level 2 of model open system interaction model in at least one commutating router (42) for access to network (40), where ports in routers (42, 44) are configured for one and the same virtual local network.

SUBSTANCE: in accordance to the invention, filter filters traffic of data packets relatively to ports, while ensuring imitation of the case where if source-device and addressee device are in one and the same level 2 domain, then address of level 2 router is the actual address of addressee both for source device and for addressee device, and also ensuring imitation of the case where if source device and addressee device are not in one and the same level 2 domain, but are in one and the same level 3 subnet, the address of level 2 router is the actual address of level 2 addressee for source to addressee. By means of such filtration, usage of one IP-subnet is implied, which extends across several rooms and a set of commutating access routers, and usage of the same subnet for a set of level 2 domains, resulting in coverage of larger number of users.

EFFECT: increased safety level in the network.

2 cl, 3 dwg