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BCP 145
RFC 8085
Title: UDP Usage Guidelines
Author: L. Eggert,
G. Fairhurst,
G. Shepherd
Status: Best Current Practice
Stream: IETF
Date: March 2017
Mailbox: lars@netapp.com,
gorry@erg.abdn.ac.uk,
gjshep@gmail.com
Pages: 55
Characters: 145359
Obsoletes: RFC 5405
See Also: BCP 145
I-D Tag: draft-ietf-tsvwg-rfc5405bis-19.txt
URL: https://www.rfc-editor.org/info/rfc8085
DOI: 10.17487/RFC8085
The User Datagram Protocol (UDP) provides a minimal message-passing
transport that has no inherent congestion control mechanisms. This
document provides guidelines on the use of UDP for the designers of
applications, tunnels, and other protocols that use UDP. Congestion
control guidelines are a primary focus, but the document also
provides guidance on other topics, including message sizes,
reliability, checksums, middlebox traversal, the use of Explicit
Congestion Notification (ECN), Differentiated Services Code Points
(DSCPs), and ports.
Because congestion control is critical to the stable operation of the
Internet, applications and other protocols that choose to use UDP as
an Internet transport must employ mechanisms to prevent congestion
collapse and to establish some degree of fairness with concurrent
traffic. They may also need to implement additional mechanisms,
depending on how they use UDP.
Some guidance is also applicable to the design of other protocols
(e.g., protocols layered directly on IP or via IP-based tunnels),
especially when these protocols do not themselves provide congestion
control.
This document obsoletes RFC 5405 and adds guidelines for multicast
UDP usage.
This document is a product of the Transport Area Working Group Working Group of the IETF.
BCP: This document specifies an Internet Best Current Practices for the
Internet Community, and requests discussion and suggestions for
improvements. Distribution of this memo is unlimited.
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