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:
Sep. 24, 2013
Filed:
Mar. 02, 2006
Reshad A. Rahman, Ottawa, CA;
David P. Toscano, Ottawa, CA;
Sylvain Masse, Gatineau, CA;
David D. Ward, Los Gatos, CA (US);
Neil R. Ketley, Harpenden, GB;
Reshad A. Rahman, Ottawa, CA;
David P. Toscano, Ottawa, CA;
Sylvain Masse, Gatineau, CA;
David D. Ward, Los Gatos, CA (US);
Neil R. Ketley, Harpenden, GB;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A technique efficiently and dynamically maintains bidirectional forwarding detection (BFD) on a bundle of links in a computer network. According to the novel technique, one or more 'standby' BFD sessions may be established on one or more corresponding line cards (LCs), the LCs having one or more links of the bundle (bundle links). Once established, one of the standby BFD sessions may be selected as an 'active' BFD session based on activity of one of the bundle links of the corresponding LC. Also, BFD messages may be transmitted from one of the bundle links of the active BFD session, e.g., the link receiving BFD messages. In response to inactivity of the transmitting link (e.g., failure, removal, etc.), the active BFD session may switch to another available active bundle link, and if no other active bundle links are available to the active BFD session, one of the standby BFD sessions is selected as the new active BFD session. In the event no other standby BFD sessions exist, the link bundle is determined to have failed.