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:
Oct. 09, 2007
Filed:
Jan. 10, 2003
John Rigby, Reading, GB;
Shiva Shenoy, San Jose, CA (US);
Prashanth Ishwar, Santa Clara, CA (US);
Apurva Mehta, Cupertino, CA (US);
John Rigby, Reading, GB;
Shiva Shenoy, San Jose, CA (US);
Prashanth Ishwar, Santa Clara, CA (US);
Apurva Mehta, Cupertino, CA (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Protection switching between primary and secondary paths in a packet-based network involves table entries that are pre-programmed with a primary path, a secondary path, and a value that identifies the primary path, referred to as a primary path identifier (PPI). When table entries are accessed to make forwarding decisions, the PPI is compared to a field that identifies that a particular path is down, referred to as a down path identifier (DPI). If the two fields match, (i.e., PPI=DPI), then the secondary path is selected instead of the primary path as the path on which the traffic should be forwarded.