Passive virtual router redundancy prototcol

Details Passive virtual router redundancy prototcol Passive virtual router redundancy prototcol

2006-12-21

2009-08-11

Marcelo, Melvin (Department: 2416)

Multiplex communications

Fault recovery

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

Reexamination Certificate

active

07573812

ABSTRACT:
The present invention relates to a pair of routers which implement an active VRRP group and one or more passive VRRP groups wherein the active VRRP group executes the VRRP election protocol and the passive VRRP group(s) do not execute the VRRP election protocol but instead the passive VRRP group(s) mimic the active VRRP group such that when the active VRRP group has a state change then all of it's dependent passive VRRP group(s) will also have the same state change such as becoming a master or a backup.

REFERENCES:
patent: 2005/0117598 (2005-06-01), Iijima et al.
patent: 2007/0008880 (2007-01-01), Buchko et al.
Kuo et al., ‘An Evaluation of the Virtual Router Redundancy Protocol Extension with Load Balancing’, Dec. 2005, Dependable Computing, 2005, pp. 1-8.
Hinden, R. and Nokia; “Virtual Router Redundancy Protocol (VRRP)”; Network Working Group; Request for Comments: 3768; Obsoletes: 2338; Category: Standards Track; Apr. 2004 The Internet Society (2004).

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