6to4 provider managed tunnels draft kuarsingh v6ops 6to4 provider managed tunnel 02
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6to4 Provider Managed Tunnels draft-kuarsingh-v6ops-6to4-provider-managed-tunnel-02. Victor Kuarsingh, Rogers Communications Inc. Level Set. Native IPv6 is still the best option for IPv6 services Native IPv6 is “NOT” available or deployable everywhere right now (working on that)

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6to4 provider managed tunnels draft kuarsingh v6ops 6to4 provider managed tunnel 02

6to4 Provider Managed Tunnelsdraft-kuarsingh-v6ops-6to4-provider-managed-tunnel-02

Victor Kuarsingh, Rogers Communications Inc


Level set

Level Set

  • Native IPv6 is still the best option for IPv6 services

  • Native IPv6 is “NOT” available or deployable everywhere right now (working on that)

    • Vendor Equipment/Software (Network Side)

    • CPE (install base, buggy IPv6 code)

    • Transition Technologies often requires CPE

  • 6to4 is out there

    • Hosts, gateways/CPEs (in use)

  • 6to4 is challenging for providers who have CGNs in place or soon will have (IPv4 depletion)

    • IPv6 connectivity does not solve the entire IPv4 challenges


Document scope adjustments

Document Scope (Adjustments)

  • Original scope of document included:

    • Unmanaged CPE with 6to4 Turned(Challenged connectivity)

    • CPEs with 6to4 Turned on Behind CGN

  • Draft now concentrates on main use case of 6to4 behind CGN

    • Where Global IPv4 addresses are Used (Legitimate and less legitimate use cases)

    • Transparency not an issue here (broken anyways)

  • Can still technically be used for non-CGN use case (Not Recommended)

  • No direct participation required from external networks


Technical points brief

Technical Points (Brief)

  • 6to4-PMT operates northbound of 6to4 (RFC3068) clients

  • Combines normal 6to4 with NAT66 operation

    • No Checksum Neutral mappings / devcode utilized RFC3022 Checksum Adjustment

  • Translates 2002: ADDR to 2001:db8 (Provider Assigned) ADDR

  • Low Cost

    • updates current 6to4 relays if Linux based as example – in place upgrade

  • If used in non-CGN model, may help alleviate challenges related to neighboring networks

    • draft-carpenter-v6ops-6to4-teredo-advisory (typo in draft reference)


Testing results preprod environment

Testing Results (PreProd Environment)

  • The concept works as expected (RUNNING CODE, free to use - open)

    • Client to Server options operate well

  • Able to “undo” challenges related to 6to4 behind CGN

    • Does not fix peer-peer 6to4 endpoint communication (broken anyway) – unless both sides do NAT

  • Runs on same system as normal 6to4,

    • where only policy triggered endpoints are subject to translation (provider dependent)

  • Some Considerations

    • Some peer to peer considerations (PMT to 6to4)

    • Referrals to local 2002:: from PMT subject host

    • Transparency if used in general (non-CGN) environment


Next steps

Next Steps

  • WG Document?

    • If yes then….

  • WGLC

    • If no then…

  • Chairs


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