1 / 8

Understanding NAT-PT and SIIT Applicability for IPv6 Transition

This document outlines the applicability of SIIT (RFC 2765) and NAT-PT (RFC 2766) in facilitating the transition from IPv4 to IPv6 networks. It discusses the limitations of SIIT, including issues with IPv4-mapped addresses, ICMP error message handling, multicast, and IPsec support. The document also examines the challenges faced by NAT-PT, such as application-level gateways (ALG) and DNS-ALG issues. The report is crucial for understanding how these protocols can assist legacy systems, especially in special-purpose networks like 3GPP, particularly for IMS applications needing communication across different IP versions.

jack-sweeney
Download Presentation

Understanding NAT-PT and SIIT Applicability for IPv6 Transition

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NAT-PT Applicability V6OPS WG IETF 58, Minneapolis

  2. Design Team Members • Peter Barany • Karim El-Malki • Howard H. Wang • Rob Austein • Satomi Okazaki • Senthil Sivakumar • Suresh Satapati

  3. Goals To document the applicability of • SIIT (RFC 2765) • NAT-PT (RFC 2766)

  4. SIIT Limitations • Usage of IPv4-mapped addresses • Translation Semantics – ICMP error messages (embedded headers), parameter problem • Multicast will not work • Limited support for IPsec ESP Transport mode (doesn’t support ICMP) • IPsec ESP tunnel mode, AH doesn’t work

  5. NAT-PT Limitations • Difficult to cope up with ALG model to support applications • All SIIT limitations + IPsec ESP transport mode doesn’t work • DNS-ALG • Failure modes for AAAA queries in IPv6->IPv4 direction

  6. Applicability • SIIT • header conversion algorithm is useful • IPv6 hosts are *really* not IPv6-only • RSIP style

  7. Applicability (contd.) • NAT-PT • Legacy v4 nodes • Special purpose networks – 3gpp • 3GPP hosts, running SIP-based IMS applications over IPv6, must be able to communicate with IPv4 SIP hosts • For IMS media translation • a proxy supplies the mapping as opposed to SIP-ALG

  8. Next steps • WG item ?

More Related