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:
Aug. 09, 2011
Filed:
Oct. 02, 2007
Shyam Suri, Fremont, CA (US);
Shyam Suri, Fremont, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Methods and apparatus for enabling a provider to perform a tracing procedure to determine the existence forwarding problems within its network are disclosed. According to one aspect of the present invention, a method for detecting a forwarding problem within an autonomous system includes initiating a message from a source node. The message is sent to a message destination that is an external address relative to the autonomous system. The method also includes forwarding the message from the source node along a path to the external address which includes an intermediate node and a destination node. The message is received on the destination node through a first path segment of the path. Finally, the message is removed from the path at the destination node, and a response that indicates that the intermediate node does not have a forwarding problem is sent along the first path segment to the source node.