RFC 7289

Carrier-Grade NAT (CGN) Deployment with BGP/MPLS IP VPNs, June 2014

File formats:
icon for text file icon for PDF icon for HTML
Status:
INFORMATIONAL
Authors:
V. Kuarsingh, Ed.
J. Cianfarani
Stream:
IETF
Source:
opsawg (ops)

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC7289

Discuss this RFC: Send questions or comments to the mailing list opsawg@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF  |  View History of RFC 7289


Abstract

This document specifies a framework to integrate a Network Address Translation (NAT) layer into an operator's network to function as a Carrier-Grade NAT (also known as CGN or Large-Scale NAT). The CGN infrastructure will often form a NAT444 environment as the subscriber home network will likely also maintain a subscriber-side NAT function. Exhaustion of the IPv4 address pool is a major driver compelling some operators to implement CGN. Although operators may wish to deploy IPv6 to strategically overcome IPv4 exhaustion, near- term needs may not be satisfied with an IPv6 deployment alone. This document provides a practical integration model that allows the CGN platform to be integrated into the network, meeting the connectivity needs of the subscriber while being mindful of not disrupting existing services and meeting the technical challenges that CGN brings. The model included in this document utilizes BGP/MPLS IP VPNs, which allow for virtual routing separation, helping ease the CGN's impact on the network. This document does not intend to defend the merits of CGN.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.




Advanced Search