Cooperative TCP / BGP window management for stateful switchover

Details Cooperative TCP / BGP window management for stateful switchover Cooperative TCP / BGP window management for stateful switchover

2011-06-07

2011-06-07

Ly, Anh-Vu (Department: 2472)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S503000

Reexamination Certificate

active

07957268

ABSTRACT:
A system and method for performing stateful switchover with reduced data, such as only metadata about a TCP window state. The metadata comprises a size of TCP packets used to send BGP messages, and which of those have been acknowledged by a neighbor networking device. The networking device comprises a BGP module to establish a BGP session between the networking device and a neighbor networking device. An active transport module within the networking device synchronizes with a standby transport module within the networking device by sending the metadata. A fault detector within the networking device initiates a stateful switchover from the active transport module to the standby transport module responsive to detecting a failure of a process and/or processor. The standby transport module uses the metadata to determine stateful metadata for preserving current BGP and TCP sessions of the networking device.

REFERENCES:
patent: 7406037 (2008-07-01), Okita
patent: 2005/0265346 (2005-12-01), Ho et al.
patent: 2007/0248108 (2007-10-01), Visser et al.
patent: 2009/0129261 (2009-05-01), Visser et al.

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