RFC 1191
Path MTU discovery, November 1990
- File formats:
- Status:
- DRAFT STANDARD
- Obsoletes:
- RFC 1063
- Authors:
- J. Mogul
S. Deering - Stream:
- [Legacy]
Cite this RFC: TXT | XML | BibTeX
DOI: https://doi.org/10.17487/RFC1191
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Abstract
This memo describes a technique for dynamically discovering the maximum transmission unit (MTU) of an arbitrary internet path. It specifies a small change to the way routers generate one type of ICMP message. For a path that passes through a router that has not been so changed, this technique might not discover the correct Path MTU, but it will always choose a Path MTU as accurate as, and in many cases more accurate than, the Path MTU that would be chosen by current practice. [STANDARDS-TRACK]
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.