Redirect checking in a network device

Details Redirect checking in a network device Redirect checking in a network device

2006-07-25

2006-07-25

Lee, Andrew C. (Department: 2616)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S400000, C370S410000

Reexamination Certificate

active

07082134

ABSTRACT:
A network device for performing redirect checking includes an input device and processing logic. The input device receives a data packet on a first one of a number of interfaces. The data packet includes source and destination addresses. The processing logic assigns an incoming interface to the data packet and generates forwarding information identifying a next hop for the data packet. The processing logic also identifies an outgoing interface based on the next hop and determines whether the incoming interface index is equal to the outgoing interface index. The processing logic also determines whether the data packet originated from a station that is part of the same subnet as the next hop. When both of these conditions are met, the processing logic generates a redirect message.

REFERENCES:
patent: 5905725 (1999-05-01), Sindhu et al.
patent: 6578087 (2003-06-01), Garakani et al.
patent: 6885667 (2005-04-01), Wilson
patent: 6922410 (2005-07-01), O'Connell
patent: 6925085 (2005-08-01), Krishna et al.
“Redirecting Future Transmissions to an Alternate Router,” Optimized Engineering Corporation, http://www.optimized.com/COMPENDI/ICM-Redr.htm, Jun. 18, 2001 (print date), 5 pages.

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