Reference document

Org
IETF
Pubnum
RFC 1191
Date
1990-11
Version
Title
Path MTU Discovery

Applicability

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.

Responsible Party

Name
FMN CPWG

Status

URI
https://www.ietf.org/rfc/rfc1191.txt

History

Flag Date RFC Version
added 2019-12-12 12-025 13.0
UUID
e25d963f-d9df-4168-9e33-9dec328d2a05

Relationships

This standard is used by the following service profiles: