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US 2004/0165581 A1Published application
Virtual access router
AssigneeHitachi Communication Technologies, Ltd.
InventorMinoru Oogushi
Life of this patent
Estimating the term…
Abstract
Access routers making up a LAC device or LNS device are given virtual router functions. The virtual routers are associated with either physical interfaces or fixed logical interfaces, L2TP tunnels, or PPP sessions. This allows one LAC device or LNS device to be connected with a plurality of L2TP transfer networks or ISP networks managed by different carriers.
Claims18
A virtual access router having an LNS function or LAC function comprises:
- a plurality of communication I/Fs to transmit and receive packets;
- a plurality of first logical interfaces associated with the communication I/Fs to transmit and receive packets to and from user terminals;
- a plurality of second logical interfaces associated with the communication I/Fs to transmit and receive packets to and from backbone networks;
- routing information tables managed by virtual routers and storing routing information;
- and
- a means to associate one of the virtual routers to one of the first logical interfaces and to one of the second logical interfaces;
- wherein packets received from the first logical interface are forwarded to one of the second logical interfaces associated with the virtual router according to the routing information table corresponding to the virtual router associated with the first logical interface.
4 more elements
A virtual access router comprising:
- a plurality of communication I/Fs to connect to external communication lines;
- a processor to execute predetermined processing on packets transmitted and received through the terminal;
- and
- a memory to store reference information used to execute predetermined processing on received packets;
- wherein the memory stores:
- physical interface identifiers or logical interface identifiers of the received packets and an interface table holding a relation between the interface identifiers and virtual router identifiers;
- and
- a routing information table holding routing information to be processed by routers corresponding to the virtual router identifiers;
- wherein the processor refers to the interface table and identifies an identifier of a virtual router that is to process the received packets and
- reads from the routing information table routing information managed by the virtual router corresponding to the virtual router identifier and forwards the received packets.
7 more elements
Dependencies are inferred from the claim text.