NAT-PT Applicability V6OPS WG IETF 58, Minneapolis.

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Presentation transcript:

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 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 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 SIIT – header conversion algorithm is useful –IPv6 hosts are *really* not IPv6-only RSIP style

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 WG item ?

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