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. 18, 2018
Filed:
Dec. 11, 2015
Cisco Technology, Inc., San Jose, CA (US);
James Guichard, New Boston, NH (US);
Paul Quinn, San Francisco, CA (US);
David Ward, Los Gatos, CA (US);
Surendra Kumar, San Ramon, CA (US);
Yavindra Yadav, Cupertino, CA (US);
Michael R. Smith, San Jose, CA (US);
Nagaraj A. Bagepalli, Fremont, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Techniques are provided to decouple service chain structure from the underlying network forwarding state and allow for data plane learning of service chain forwarding requirements and any association between services function state requirements and the forward and reverse forwarding paths for a service chain. In a network comprising a plurality of network nodes each configured to apply a service function to traffic that passes through the respective network node, a packet is received at a network node. When the network node determines that the service function it applies is stateful, it updates context information in a network service header of the packet to indicate that the service function applied at the network node is stateful and that traffic for a reverse path matching the classification criteria is to be returned to the network node.