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NAT-PT Applicability

NAT-PT Applicability. V6OPS WG IETF 58, Minneapolis. Design Team Members. Peter Barany Karim El-Malki Howard H. Wang Rob Austein Satomi Okazaki Senthil Sivakumar Suresh Satapati. Goals. To document the applicability of SIIT (RFC 2765) NAT-PT (RFC 2766). SIIT Limitations.

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NAT-PT Applicability

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  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 ?

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