(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2003/0088698 Al
Singh et al. (43) Pub. Date: May 8,2003
(54) VPN FAILURE RECOVERY
(76) Inventors: Inderpreet Singh, Waltham, MA (US);
Benjamin McCann, Acton, MA (US)
FISH & RICHARDSON PC
225 FRANKLIN ST
BOSTON, MA 02110 (US)
(21) Appl. No.: 10/222,531
(22) Filed: Aug. 16, 2002
Related U.S. Application Data
(60) Provisional application No. 60/332,839, filed on Nov. 6, 2001.
(51) Int. CI.7 G06F 15/173
(52) U.S. C I 709/239
An approach to rapid lailover ol a communication path between computers that are linked by redundant virtual links in a virtual private network (VPN) features detection of communication link and device failures through an active monitoring approach and re-routing of communication through a redundant link of the VPN when a failure is detected.