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:
Aug. 02, 2011
Filed:
Apr. 10, 2009
Sasha Cirkovic, Mountain View, CA (US);
Chirayu A. Shah, Fremont, CA (US);
Balaji Rajagopalan, Sunnyvale, CA (US);
Anuradha Karuppiah, San Jose, CA (US);
Sasha Cirkovic, Mountain View, CA (US);
Chirayu A. Shah, Fremont, CA (US);
Balaji Rajagopalan, Sunnyvale, CA (US);
Anuradha Karuppiah, San Jose, CA (US);
Tellabs San Jose, Inc., Naperville, IL (US);
Abstract
An apparatus and method of a network system between a host and a group of routers using virtual router redundancy protocol ('VRRP') messages and bidirectional forwarding detection ('BFD') sessions are disclosed. The network system is capable of facilitating a first communication between a host and a master router of multiple VRRP routers and establishing a BFD session between the host and the master router. When the BFD session fails, the priority of the master router is subsequently lowered and a backup router is activated. In one embodiment, the backup router capable of performing functions of the master router becomes a new master until the BFD session resumes.