Filtering data flows based on associated forwarding tables

Details Filtering data flows based on associated forwarding tables Filtering data flows based on associated forwarding tables

2007-11-20

2007-11-20

Dalencourt, Yves (Department: 2157)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data routing

C370S231000, C370S389000

Reexamination Certificate

active

10246244

ABSTRACT:
Techniques are described for selectively filtering data, such as network packets, that correspond to forwarding tables. For example, a router receives packets from an input interface of an interface card (IFC). The router applies one or more input interface filters associated with the input interface that received the packet. The router selectively associates the packet with a forwarding table, applies a corresponding forwarding filter, and determines the output interface corresponding to the next hop of the packet. The router may further apply one or more output interface filters associated with the output interface, and forwards the packet in accordance with the respective forwarding information.

REFERENCES:
patent: 6341130 (2002-01-01), Lakshman et al.
patent: 6594268 (2003-07-01), Aukia et al.
patent: 6754729 (2004-06-01), Hass et al.
U.S. Appl. No. 10/080,865, entitled “Distributed Filtering for Networks”, filed Feb. 21, 2002, Ross Callon.
U.S. Appl. No. 10/235,455, entitled “Systems and Methods for Identifying Sources of Network Attacks”, filed Sep. 5, 2002, Ben Eater, Rob Jaeger.

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