Compressed SRv6 Segment List Encoding
RFC 9800, “Compressed SRv6 Segment List Encoding”, is a Proposed Standard document published in June 2025 by W. Cheng, C. Filsfils, Z. Li, B. Decraene, F. Clad. It updates RFC 8754. The canonical text is published by the RFC Editor.
Abstract
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.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9800 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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