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RFC 9800: Compressed SRv6 Segment List Encoding

In plain English — editorial summary, not part of the RFC

Segment Routing over IPv6 (SRv6) is the instantiation of Segment Routing (SR) on the IPv6 data plane. This document specifies new flavors for the SRv6 endpoint behaviors defined in RFC 8986, which enable the compression of an SRv6 segment list. Such compression significantly reduces the size of the SRv6 encapsulation needed to steer packets over long segment lists. This document updates RFC 8754 by allowing a Segment List entry in the Segment Routing Header (SRH) to be either an IPv6 address, as specified in RFC 8754, or a REPLACE-CSID container in packed format, as specified in this document.

Document record

Document ID
RFC9800
Published
June 2025
Authors
W. Cheng; C. Filsfils; Z. Li; B. Decraene; F. Clad
Status
PROPOSED STANDARD
Stream
IETF
Area
rtg
Pages
59
Also known as
—
Updates:
RFC 8754

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/9800-compressed-srv6-segment-list-encoding