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. 22, 2009
Filed:
Oct. 25, 2004
Praveen Jain, San Jose, CA (US);
Ranganathan Rajagopalan, Fremont, CA (US);
Ramsundar Janakiraman, Sunnyvale, CA (US);
Shashank Gupta, San Jose, CA (US);
Sachin Jain, Santa Clara, CA (US);
Praveen Jain, San Jose, CA (US);
Ranganathan Rajagopalan, Fremont, CA (US);
Ramsundar Janakiraman, Sunnyvale, CA (US);
Shashank Gupta, San Jose, CA (US);
Sachin Jain, Santa Clara, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A port shutdown protocol coordinates among various components involved in the process of administratively bringing down a link at both ends of a link connecting two switches. Execution of the protocol avoids or reduces frame drops and/or reordering. In this protocol, peer switches perform various actions when bringing down an ISL in a synchronized manner. In one implementation, this protocol uses the Exchange Peer Protocol (EPP) as the underlying transport to carry the port shutdown protocol frames.