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IPv6 Host Configuration in 6rd Deployment draft-guo-softwire-6rd-ipv6-config-00

IPv6 Host Configuration in 6rd Deployment draft-guo-softwire-6rd-ipv6-config-00. Xiaohu Xu (xuxh@huawei.com) Dayong Guo (guoseu@huawei.com ) IETF 78, Maastricht. DHCPv4 server. IPv6-only host. 6rd BR. CPE. Residential Site. IPv6 Internet. IPv4 SP Network (6rd Domain). Scenario.

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IPv6 Host Configuration in 6rd Deployment draft-guo-softwire-6rd-ipv6-config-00

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  1. IPv6 Host Configuration in 6rd Deploymentdraft-guo-softwire-6rd-ipv6-config-00 Xiaohu Xu (xuxh@huawei.com) Dayong Guo (guoseu@huawei.com ) IETF 78, Maastricht

  2. DHCPv4 server IPv6-only host 6rdBR CPE Residential Site IPv6 Internet IPv4 SP Network (6rd Domain) Scenario • Besides IPv6 addresses, IPv6-only hosts in residential sites may also need to obtain other configuration information (e.g., DNS servers, NTP servers or SIP servers etc.). • DNS Proxy [RFC5625] is an mature option but only for DNS configuration. • Stateless DHCPv6 [RFC3736] is a standard approach for obtaining other configuration information besides DNS.

  3. Requirements for Running DHCPv6 in 6rd • As stated in the DHCPv6 specification [RFC3315], "...The client MUST use a link-local address assigned to the interface for which it is requesting configuration information as the source address in the header of the IP datagram." • Since the link-local address can not travel through the 6rd domain, the CPE SHOULD act as a DHCPv6 relay agent. • Relaying DHCP request messages to All_DHCP_Servers multicast address is not optimal in 6rd scenario. • Hence, the CPE as a DHCP relay agent, SHOULD know at least one DHCPv6 server address.

  4. DHCPv4 Option for DHCPv6 Server • OPT_DHCPv6: • TBD. • Option-length: • The length of the DHCP option in octets. • IPv6 Address (es) of DHCPv6 Server (s): • One or more IPv6 addresses of DHCPv6 servers.

  5. 6rdBR DHCPv4 server IPv6-only host IPv6 Internet CPE DHCPv6 server Home Network IPv4 SP Network (6rd Domain) CPE 6rd Site owned by SP DHCPv6 in 6rd

  6. Next Steps • Solicit more comments from the WG. • Prototype and experiment. • Ask for WG adoption.

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