RFC 6888 · BEST CURRENT PRACTICE · 2013
SUN · 14 JUN 2026
Common Requirements for Carrier-Grade NATs
Overview
RFC 6888, “Common Requirements for Carrier-Grade NATs”, is a Best Current Practice document published in April 2013 by S. Perreault, I. Yamagata, S. Miyakawa, A. Nakagawa, H. Ashida. It updates RFC 4787. The canonical text is published by the RFC Editor.
Abstract
This document defines common requirements for Carrier-Grade NATs (CGNs). It updates RFC 4787.
What “Best Current Practice” means
Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.
Read this RFC
The canonical text of RFC 6888 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2013
- RFC 6887 Port Control Protocol
- RFC 6889 Analysis of Stateful 64 Translation
- RFC 6886 NAT Port Mapping Protocol
- RFC 6890 Special-Purpose IP Address Registries
- RFC 6885 Stringprep Revision and Problem Statement for the Preparation and Comparison of Internationalized Strings
- RFC 6891 Extension Mechanisms for DNS (EDNS )
- RFC 6884 RTP Payload Format for the Enhanced Variable Rate Narrowband- Wideband Codec
- RFC 6892 The 'describes' Link Relation Type