Packet transfer apparatus

Details Packet transfer apparatus Packet transfer apparatus

2006-04-26

2009-12-08

Ton, Dang T (Department: 2419)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S401000, C709S223000

Reexamination Certificate

active

07630373

ABSTRACT:
In a packet transfer apparatus, a larger number of entries can be registered to routing tables without increasing the overall memory volume required for the routing tables to record transfer information of packets. A routing table search is conducted at a high speed. Each line card of the packet transfer apparatus includes two kinds of routing tables, i.e., first and second routing tables having mutually different functions. The first routing tables are local routing tables to record frequently used transfer information in groups. The second routing tables are shared distributed routing tables and record the transfer information in a distributed way without an overlapped part of the transfer information between the line cards. The sum of the distributed transfer information matches the overall transfer information kept in the packet transfer apparatus.

REFERENCES:
patent: 2004/0030766 (2004-02-01), Witkowski
patent: 2004/0249803 (2004-12-01), Vankatachary et al.
patent: 2006/0064689 (2006-03-01), Zhang
patent: 2004-221807 (2004-08-01), None
RFC1519, Sep. 93, Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy, pp. 1-20.
“Next Generation Routers” by H. Chao., pp. 1518-1558., Proceedings of the IEEE, vol. 90, No. 9, Sep. 2002.
IDT White Paper “Optimum Search Methods for Swithc/Router Databases in Access and Metro Edge Networks” by M. Miller, et al. Jan. 2003, pp. 1-24.

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