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:
Jan. 27, 2009
Filed:
Sep. 17, 2001
Steve M. Simmons, Dallas, TX (US);
Jim Kleiner, Dallas, TX (US);
Qiang LI, Plano, TX (US);
Bing Liu, Richardson, TX (US);
Lance Arnold Visser, Dallas, TX (US);
Steve M. Simmons, Dallas, TX (US);
Jim Kleiner, Dallas, TX (US);
Qiang Li, Plano, TX (US);
Bing Liu, Richardson, TX (US);
Lance Arnold Visser, Dallas, TX (US);
Foundry Networks, Inc., Santa Clara, CA (US);
Abstract
Employing an asymmetric protocol, multiple sources reliably broadcast dynamically changing routing tables incrementally across multiple consumers from a single distributor. Each of multiple sources sends current tables to the distributor using a snapshot mechanism. Messages are buffered, segmented, paced by timers, and broadcast to the consumers repetitively at the distributor. Negative acknowledgments from the consumer request missing messages from the distributor after receipt of a keepalive message from the distributor. The distributor marks the missing messages and retransmits replacements from a history buffer only after firing of a resend timer. A unique Session ID included in all messages originating from each particular source facilitates reliable table distribution from multiple sources to multiple consumers via a single distributor.