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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.:

US 11882203 B1

PDFFull Text
Date of Patent:
Jan. 23, 2024

Filed:

Apr. 05, 2022

Providing efficiencies in processing and communicating internet protocol packets in a network using segment routing

Applicant:

Cisco Technology, Inc., San Jose, CA (US);

Inventors:

Ahmed Refaat Bashandy, Milpitas, CA (US);

Jisu Bhattacharya, San Jose, CA (US);

Syed Kamran Raza, Kanata, CA;

Clarence Filsfils, Brussels, BE;

Assignee:

Cisco Technology, Inc., San Jose, CA (US);

Attorney:

Polsinelli P.C.

Primary Examiner:

Ricky Q Ngo

Assistant Examiner:

Kabir U Jahangir

Int. Cl.
CPC ...
H04L 69/22 (2022.01); H04L 69/324 (2022.01); H04L 45/00 (2022.01); H04L 67/10 (2022.01); H04L 45/02 (2022.01); H04L 45/50 (2022.01); H04L 61/5007 (2022.01); H04L 67/63 (2022.01); H04L 12/46 (2006.01); H04L 45/74 (2022.01); H04L 49/35 (2022.01); H04L 45/741 (2022.01); H04L 61/2503 (2022.01); H04L 101/659 (2022.01); H04L 101/00 (2022.01); H04L 43/028 (2022.01); H04L 9/40 (2022.01); H04L 45/745 (2022.01);
U.S. Cl.
CPC ...
H04L 69/22 (2013.01); H04L 12/4633 (2013.01); H04L 12/4641 (2013.01); H04L 45/04 (2013.01); H04L 45/14 (2013.01); H04L 45/34 (2013.01); H04L 45/50 (2013.01); H04L 45/74 (2013.01); H04L 45/741 (2013.01); H04L 49/35 (2013.01); H04L 61/5007 (2022.05); H04L 67/10 (2013.01); H04L 67/63 (2022.05); H04L 69/324 (2013.01); H04L 43/028 (2013.01); H04L 45/745 (2013.01); H04L 61/2503 (2013.01); H04L 63/0272 (2013.01); H04L 2101/00 (2022.05); H04L 2101/659 (2022.05); H04L 2212/00 (2013.01);
Abstract

In one embodiment, a Segment Routing network node provides efficiencies in processing and communicating Internet Protocol packets in a network. This Segment Routing node typically advertises (e.g., using Border Gateway Protocol) its Segment Routing processing capabilities, such as Penultimate Segment Pop (PSP) and/or Ultimate Segment Pop (USP) of a Segment Routing Header (including in the context of a packet that has multiple Segment Routing Headers). Subsequently, an Internet Protocol Segment Routing packet having multiple Segment Routing Headers is received. The packet is processed according to a Segment Routing function, with is processing including removing a first one of the Segment Routing Headers and forwarding the resultant Segment Routing packet. The value of the Segments Left field in the first Segment Routing Header identifies to perform PSP when the value is one, to perform USP when the value is zero, or to perform other processing.

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