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:
Apr. 22, 2008
Filed:
Jun. 27, 2002
John Kevin Frick, Raleigh, NC (US);
Donald B. Grosser, Apex, NC (US);
Michael D. Mroz, Fuquay-Varina, NC (US);
John Kevin Frick, Raleigh, NC (US);
Donald B. Grosser, Apex, NC (US);
Michael D. Mroz, Fuquay-Varina, NC (US);
Extreme Networks, Inc., Santa Clara, CA (US);
Abstract
A method for hitless restart of layerpacket forwarding includes replicating some but not all state information from a master management service module to a slave management service module. The master management service module builds a layerrouting table by participating in layerrouting protocols. The layerrouting table is stored in memory. The master management service module builds a first layerforwarding table and stores the forwarding information in hardware. A slave management service module receives a copy of the first layerforwarding table from the master management service module. When the master management service module fails, the slave management service module initiates construction of a routing table by participating in layerrouting protocols. Packet forwarding is not interrupted because forwarding using hardware entries continues. The slave management service module links entries in the newly constructed routing table to those stored in the forwarding table.