Handling sequence numbers and/or an anti-replay window after...

Details Handling sequence numbers and/or an anti-replay window after... Handling sequence numbers and/or an anti-replay window after...

2006-08-31

2009-08-04

Le, Dieu-Minh (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C709S203000

Reexamination Certificate

active

07571343

ABSTRACT:
To prevent loss of packets due to failover between server systems in which a failover mechanism is provided in a first server system to enable a second server system to failover to the first server system, the first server system includes a first sequence number space that is different from a second sequence number space in the second server system. The first and second sequence number spaces are part of a total sequence number space. After failover from the second server system to the first server system, the first server system sends packets containing sequence numbers in the first sequence number space which are defined by a security protocol.

REFERENCES:
patent: 6286032 (2001-09-01), Oberlander et al.
patent: 7213063 (2007-05-01), Bressoud et al.
patent: 2004/0199808 (2004-10-01), Freimuth et al.
patent: 2005/0256972 (2005-11-01), Cochran et al.
patent: 2006/0179147 (2006-08-01), Tran et al.
patent: 2006/0248126 (2006-11-01), Melander
RFC 791, “Internet Protocol DARPA Internet Program Protocol Specification,” pp. 1-45 (Sep. 1981).
RFC 2401, “Security Architecture for the Internet Protocol,” pp. 1-59 (Nov. 1998).
RFC 2406, “IP Encapsulating Security Payload (ESP),” pp. 1-22 (Nov. 1998).
RFC 2408, “Internet Security Association and Key Management Protocol (ISAKMP),” pp. 1-86 (Nov. 1998).
RFC 3768, “Virtual Router Redundancy Protocol (VRRP),” pp. 1-27 (Apr. 2004).
RFC 4301, “Security Architecture for the Internet Protocol,” pp. 1-101 (Dec. 2005).
RFC 4302, “IP Authentication Header,” pp. 1-34 (Dec. 2005).
RFC 4303, “IP Encapsulating Security Payload (ESP),” pp. 1-44 (Dec. 2005).
RFC 4306, “Internet Key Exchange (IKEv2) Protocol,” pp. 1-98 (Dec. 2005).

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