Network physical connection inference for IP tunnels

Details Network physical connection inference for IP tunnels Network physical connection inference for IP tunnels

2011-02-22

2011-02-22

Shah, Chirag G (Department: 2477)

Multiplex communications

Network configuration determination

C370S401000

Reexamination Certificate

active

07894369

ABSTRACT:
The physical connection corresponding to IP tunnels in a network are found by tracing through the device configuration and routing tables at the routers in the network to determine the outbound interface associated with each tunnel endpoint, and then inferring a likely return interface associated with the opposite tunnel endpoint. Depending upon the particular configurations, a variety of tests can be applied to validate the inference. Patricia trees are preferably used to store and process the configuration data for efficient tracing through the routing tables at each router.

REFERENCES:
patent: 6173399 (2001-01-01), Gilbrech
patent: 6405248 (2002-06-01), Wood
patent: 6717944 (2004-04-01), Bryden et al.
patent: 2004/0037260 (2004-02-01), Kakemizu et al.
patent: 2005/0022189 (2005-01-01), Proulx et al.
patent: 2006/0059370 (2006-03-01), Asnis et al.

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