Patent · US Active

Explicit service function chaining (SFC) using DNS extensions

US11102166B2 · kind B2 · utility

0Cited by

0References

20Claims

0Family size

Assignee

NEC CORPORATION · JP

Inventors

Alessio Silvestro · Heidelberg, DE
Fabian Schneider · Darmstadt, DE
Roberto Bifulco · Heidelberg, DE

Key dates

Filing date	Mar 10, 2017
Grant date	Aug 24, 2021
Priority date	—
Expiry date	Mar 10, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH04L61/4552
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method for service function chaining within an end-to-end path of a network connection between a source and destination node includes: executing, for a defined service function chain including an ordered sequence of network service functions, an address resolution process that translates names of the network service functions of the defined service function chain into their corresponding IP addresses. The address resolution process is performed at a name server of the destination node by a sequence of name server queries sent in succession to respective name servers of each of the selected network service functions of the defined service function chain in accordance with their order. Each of the name server queries is answered by a response from a name server of the respective network service function that includes IP addresses of selected instances of a respective network service function chosen by the respective name server according to predefined criteria.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.