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RFC 9885: Multi-Part TLVs in IS-IS

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

New technologies are adding new information into IS-IS while deployment scales are simultaneously increasing. This causes the contents of many critical TLVs to exceed the currently supported limit of 255 octets. This document codifies the common mechanism of extending the TLV content space through multiple TLVs.

Document record

Document ID
RFC9885
Published
October 2025
Authors
P. Kaneriya; T. Li; A. Przygienda; S. Hegde; L. Ginsberg
Status
PROPOSED STANDARD
Stream
IETF
Area
rtg
Pages
26
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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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