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:
Dec. 23, 2014
Filed:
Oct. 17, 2013
Applicant:
Cisco Technology, Inc., San Jose, CA (US);
Inventors:
Hemant Singh, Westford, MA (US);
William Beebee, Jr., Lowell, MA (US);
Ralph Droms, Westford, MA (US);
Ole Troan, Bergen, NO;
Assignee:
Cisco Technology, Inc., San Jose, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 12/28 (2006.01); H04L 12/24 (2006.01); H04L 29/12 (2006.01);
U.S. Cl.
CPC ...
H04L 41/0803 (2013.01); H04L 41/0816 (2013.01); H04L 29/12226 (2013.01); H04L 61/2015 (2013.01); H04L 61/6059 (2013.01);
Abstract
Techniques for automatically identifying an edge-facing router in a network are provided. In one technique, a DHCP message is obtained at a router of a subscriber network. An options field of the DHCP message is identified. The options field of the DHCP message is analyzed to determine whether data in the options field indicates that first router is SP-facing. If it is determined that the router is an SP-facing router, then identification data that identifies the router as an SP-facing router is stored.