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NAT64 Operational Considerations draft-chen-v6ops-nat64-cpe-03.txt IETF 82- Taipei, Nov 2011

NAT64 Operational Considerations draft-chen-v6ops-nat64-cpe-03.txt IETF 82- Taipei, Nov 2011. Gang Chen ( chengang@chinamobile.com ) Qibo Niu( niu.qibo@zte.com.cn ). Changes since IETF#81 (-02 to -03).

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NAT64 Operational Considerations draft-chen-v6ops-nat64-cpe-03.txt IETF 82- Taipei, Nov 2011

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  1. NAT64 Operational Considerationsdraft-chen-v6ops-nat64-cpe-03.txtIETF 82- Taipei, Nov 2011 Gang Chen (chengang@chinamobile.com) Qibo Niu(niu.qibo@zte.com.cn)

  2. Changes since IETF#81 (-02 to -03) • Added different deployment considerations regarding the different positions of NAT64, which is focusing “An IPv6 Network to the IPv4 Internet: NAT64-CGN” and “The IPv6 Internet to an IPv4 Network: NAT64-CE” • Aligned with RFC6144

  3. Considerations for NAT64-CGN deployment PC DNS DNS64 HG ONU/SW OLT/SW BRAS NAT64 IPv4 Server PPPoEv6/IPoEv6 SLAAC/DHCPv6 DNS query(AAAA) DNS query(AAAA/A) DNS Response(synthesized AAAA) DNS Response (A) IPv6 Network IPv4 Internet • Implementation: Standalone CGN VS Embedded CGN (BNG, Aggregation Router or PGW) • CGN location: centralized deployment VS distributed deployment; • Performance: Traffic throughout, concurrent sessions and session rate of IDC CGN and Internet CGN is related with WEB traffic and Subscriber scale respectively, • Reliability: NAT64 session + Filter/Mapping mode should be synchronized between Master and backup CGN • Service Richness: FTP, SIP, DNS64, RSTP, H.323, SCCP, PPTP and so on; • Security: Lawful interception (ETSI CC IIF) and user traceability for Legal Entity; TCP tracking, uRPF, blacklist and Mapping/Filter mode for CGN security; • Other requirements: Load Balancer, PCP server and subscriber policy (similar to BNG)

  4. Considerations for NAT64-CE deployment NAT64-CE PC IPv6 Internet PC Residential Network Enterprise Network NAT64-CE IPv4 Network IPv6 Internet • Implementation: Embedded NAT64 functionalities • NAT64 location: Co-located with enterprise gateway or home gateway • Performance: NAT64 are serving for relatively small scale of customers • DNS resolving: static AAAA records can be added directly in authoritative DNS • Service Richness: VPN, P2P, Web (Office automation), FTP • Reliability: Standalone NAT64 deployment • Security: IPsec VPN may need to be deployed to prevent privacy invasion • Other requirements: PCP proxy functionalities

  5. Next steps • Future works • Add justification for NAT64 deployment considerations • Make detailed comparison for different cases • Adopt?

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