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S. Daniel Park soohng.park@samsung

DHCP Option for Configuring IPv6-in-IPv4 Tunnels <draft-daniel-dhc-ipv6in4-opt-01> DHC WG – 59 th IETF. S. Daniel Park soohng.park@samsung.com. Background.

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S. Daniel Park soohng.park@samsung

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  1. DHCP Option for Configuring IPv6-in-IPv4 Tunnels<draft-daniel-dhc-ipv6in4-opt-01>DHC WG – 59th IETF S. Daniel Park soohng.park@samsung.com

  2. Background • This DHCPv4 option allows a dual host to bootstrap itself into a disconnected IPv6 infrastructure – for example, a dual-stack host on an IPv4-only link. • to provide configured tunnel end point automatically • for the simple configured tunnel • for the IPv4/6 dual host 59th IETF – DHC WG , Seoul

  3. Overview Code Length CTEP Order in Sequence 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | OPTION_CTEP | Len | CTEP Addr1 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CTEP Addr 1 | Subnet Mask 1 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Subnet Mask 1 | CTEP Addr 2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CTEP Addr 2 | Subnet Mask 2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Subnet Mask 2 |. . . +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IPv6 IPv4 IPv6 IPv6 connectivity IPv6-in-IPv4 IPv4/6 IPv4 59th IETF – DHC WG , Seoul

  4. Comments from ML • What exactly is the subnet mask used for ? - Bernie • IPv6 network information – Bernie • IPv4 address of the tunnel endpoint • IPv6 address and prefix-length for the IPv6 network reachable • The receiving host encapsulates and forwards any IPv6 datagrams that match the IPv6 prefix in an IPv4 datagram sent to the IPv4 tunnel endpoint address. - Ralph • Ambiguous word – Bernie • IPv6-in-IPv4 vs IPv6-over-IPv4 • Are the prefix length and prefix really needed ? - Bernie 59th IETF – DHC WG , Seoul

  5. Changes from 00 • not published because of cutoff. It will be available soon • added Multiple Tunnel End Point Considerations section to clarify how both single TEP and multiple TEP are considered… • generally single TEP is used for IPv6 connectivity and all packet are reached to the same point • in multiple TEP, the routes will be tried in a round robin fashion if an host load-sharing is honored • accepted as WG Item ? 59th IETF – DHC WG , Seoul

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