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. 15, 2020
Filed:
Mar. 02, 2020
Netskope, Inc., Santa Clara, CA (US);
Ravi Ithal, Los Altos, CA (US);
Umesh Bangalore Muniyappa, Bangalore, IN;
Netskope, Inc., Santa Clara, CA (US);
Abstract
The technology discloses a method of improved recovery from failure of a service instance in a service chain. Instances AA, BA and BB perform services A and B respectively. Instance BA receives from instance AA a first packet that includes an added header with a stream affinity code consistent for packets in the stream. Instance BA with a primary role specified in a distributed service map processes the packet. BA identifies BB as having a secondary role for packets carrying the code and synchronizes BA state information with BB after processing the packet. After failure of instance BA, instance AA receives an updated service map prepares to forward a second packet, with the same code as the first packet, to BA. After determining from the updated map that BA is no longer available and instance BB has the secondary role, AA forwards the second packet to BB, instead of BA.