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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

NAT-PT Applicability

V6OPS WG

IETF 58, Minneapolis


Design team members
Design Team Members

  • Peter Barany

  • Karim El-Malki

  • Howard H. Wang

  • Rob Austein

  • Satomi Okazaki

  • Senthil Sivakumar

  • Suresh Satapati


Goals
Goals

To document the applicability of

  • SIIT (RFC 2765)

  • NAT-PT (RFC 2766)


Siit limitations
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


Nat pt limitations
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


Applicability
Applicability

  • SIIT

    • header conversion algorithm is useful

    • IPv6 hosts are *really* not IPv6-only

      • RSIP style


Applicability contd
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


Next steps
Next steps

  • WG item ?


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