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

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Publisher: IETF
Doc Type: Informational
Pages: 20
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.
Publication Date: 2014-06-01
Status Note: Informational
DOI: 10.17487/RFC7289
Link: https://doi.org/10.17487/RFC7289
Author(s): Victor Kuarsingh
John Cianfarani
Keyword(s): NAT444, CGN

Latest version of IETF RFC 7289

Document Versions — IETF RFC 7289

▶ IETF RFC 7289 (2014-06-01)

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Bibliographic Reference(s)

Donley, C., Grundemann, C., Sarawat, V., Sundaresan, K., and O. Vautrin, "Deterministic Address Mapping to Reduce Logging in Carrier Grade NAT Deployments", Work in Progress, January 2014. EXTERNAL
IETF RFC 1918 [Active*]
IETF RFC 3031 [Active*]
IETF RFC 5332 [Active*]
IETF RFC 6037 [Active*]
IETF RFC 6146 [Active*]
IETF RFC 6264 [Active*]
IETF RFC 6333 [Active*]
IETF RFC 6513 [Active*]
IETF RFC 6598 [Active*]
IETF RFC 6888 [Active*]
IETF RFC 7021 [Active*]

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IETF RFC 7289, Carrier-Grade NAT (CGN) Deployment with BGP/MPLS IP VPNs. Available at https://doi.org/10.17487/RFC7289

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IETF RFC 7289, Carrier-Grade NAT (CGN) Deployment with BGP/MPLS IP VPNs. Available at https://doi.org/10.17487/RFC7289

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<span class="citation"><cite>IETF RFC 7289</cite>, Carrier-Grade NAT (CGN) Deployment with BGP/MPLS IP VPNs. Available at <a href="https://doi.org/10.17487/RFC7289" target="_blank" rel="noopener">https://doi.org/10.17487/RFC7289</a></span>

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IETF RFC 7289, Carrier-Grade NAT (CGN) Deployment with BGP/MPLS IP VPNs
doi: 10.17487/RFC7289
url: https://doi.org/10.17487/RFC7289

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<cite id="bib-rfc7289">IETF RFC 7289</cite>, Carrier-Grade NAT (CGN) Deployment with BGP/MPLS IP VPNs
<span class="doi">10.17487/RFC7289</span>
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Referenced By

IETF RFC 8512 [Active*]