The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2009
Filed:
Jun. 23, 2005
Clarence A. M. Filsfils, Brussels, BE;
James N. Guichard, Groton, MA (US);
Robert Raszuk, Komorow, PL;
Jean-philippe Vasseur, Dunstable, FR;
Kris Michielsen, Keerbergen, BE;
Peter DE Vriendt, Denderleeuw, BE;
Clarence A. M. Filsfils, Brussels, BE;
James N. Guichard, Groton, MA (US);
Robert Raszuk, Komorow, PL;
Jean-Philippe Vasseur, Dunstable, FR;
Kris Michielsen, Keerbergen, BE;
Peter De Vriendt, Denderleeuw, BE;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A method, apparatus and computer program product for providing convergence for a dual-homed site in a network is presented. An occurrence of a failure between a first Provider Edge (PE) device and a first Customer Edge (CE) device in communication with a dual-homed site is detected. A determination is made whether an alternate route exists for the dual-homed site in a routing table associated with the first PE device. When an alternate route exists then a routing entry associated with the first CE device in a routing table of said first PE device is kept from being deleted for a predetermined amount of time, the routing table is modified to reference the alternate route, the routing entry is rewritten to perform a POP and lookup in a VRF table of the first PE device, and the routing entry is deleted after the predetermined amount of time has elapsed.