Electrical computers and digital processing systems: multicomput – Computer-to-computer data routing – Routing data updating
Reexamination Certificate
2003-10-03
2010-06-15
Vaughn, Jr., William C (Department: 2444)
Electrical computers and digital processing systems: multicomput
Computer-to-computer data routing
Routing data updating
C709S225000, C714S004110
Reexamination Certificate
active
07739403
ABSTRACT:
Techniques are described for synchronizing state information between a plurality of control units. A router, for example, is described that includes a primary control unit and a standby control unit. The primary control unit maintains router resources to ensure operation of the router. To ensure operation, the primary control unit receives state information from the router resources and maintains the state information for consumers, i.e. router resources that require or “consume” state information. Prior to updating the consumers with the state information, the primary control unit synchronizes the state information with the standby control unit. In the event the primary control unit fails, the standby control unit assumes control of the router resources. Upon assuming control, the standby control unit resumes updating the consumers with state information without having to “relearn” state information, e.g., by way of power cycling the router resources to a known state.
REFERENCES:
patent: 5848227 (1998-12-01), Sheu
patent: 6219706 (2001-04-01), Fan et al.
patent: 6594229 (2003-07-01), Gregorat
patent: 6633544 (2003-10-01), Rexford et al.
patent: 6671694 (2003-12-01), Baskins et al.
patent: 6751191 (2004-06-01), Kanekar et al.
patent: 6799319 (2004-09-01), Van Loo
patent: 6865591 (2005-03-01), Garg et al.
patent: 6910148 (2005-06-01), Ho et al.
patent: 6948088 (2005-09-01), Sharan
patent: 6965903 (2005-11-01), Agarwal et al.
patent: 6983317 (2006-01-01), Bishop et al.
patent: 7076555 (2006-07-01), Orman et al.
patent: 7076696 (2006-07-01), Stringer
patent: 7096383 (2006-08-01), Talaugon et al.
patent: 7111035 (2006-09-01), McClellan et al.
patent: 7162737 (2007-01-01), Syvanne et al.
patent: 7164676 (2007-01-01), Chakraborty
patent: 2002/0107966 (2002-08-01), Baudot et al.
patent: 2003/0056138 (2003-03-01), Ren
patent: 2003/0084371 (2003-05-01), Mongazon-Cazavet et al.
patent: 2003/0217096 (2003-11-01), McKelvie et al.
patent: 2004/0034871 (2004-02-01), Lu et al.
patent: 2004/0073646 (2004-04-01), Cho et al.
patent: 2004/0073831 (2004-04-01), Yanai et al.
patent: 2004/0078619 (2004-04-01), Vasavada
patent: 2004/0078625 (2004-04-01), Rampuria et al.
patent: 2004/0199808 (2004-10-01), Freimuth et al.
patent: 2005/0257213 (2005-11-01), Chu et al.
U.S. Appl. No. 10/457,814, entitled “Managing State Information in a Computing Environment,” by David M. Katz et al., filed Jun. 9, 2003.
Balakrishna Raghunath
Chadalavada Bharani
Krishnaswamy Umesh
Kumar Sandeep
Sivaramakrishnan Rajagopalan
Cloud Joiya M
Juniper Networks, Inc.
Shumaker & Sieffert P.A.
Vaughn, Jr. William C
LandOfFree
Synchronizing state information between control units does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronizing state information between control units, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronizing state information between control units will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4151022