1IETF56 DNSOP WG The Autoconfiguration of Recursive DNS Server and the Optimization of DNS Name Resolution in Hierarchical Mobile IPv6 Jae-Hoon Jeong,

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1IETF56 DNSOP WG The Autoconfiguration of Recursive DNS Server and the Optimization of DNS Name Resolution in Hierarchical Mobile IPv6 Jae-Hoon Jeong, Jung-Soo Park, Kyeong-Jin Lee, Hyoung-Jun Kim ETRI 18 th March th IETF – San Francisco, California, USA draft-jeong-hmipv6-dns-optimization-00.txt

2IETF56 DNSOP WG Motivation of the draft The current DNS name resolution depends on fixed recursive DNS server(s) preconfigured in the node if we don’t use DHCPv6. –But, this is not suitable in the mobile IPv6 environment. In the respect of DNS name resolution time. What solutions are there to save DNS name resolution time? –This draft suggests one of the possible solutions.

3IETF56 DNSOP WG Idea of the draft Autoconfiguration of recursive DNS server (RDNSS) –Through RA-based DNS discovery, a mobile node can configure the address of recursive DNS server(s) placed in the visited network statelessly. Optimization of DNS name resolution –It is possible by using the local recursive DNS server placed in the visited network instead of that placed in the home network. The scope of this draft –Hierarchical Mobile IPv6 Network But the idea of this draft can be applied to mobile IPv6 network or normal IPv6 network.

4IETF56 DNSOP WG Current DNS service scenario (1/2) Internet Mobility Anchor Point (MAP) MN RDNSS2 DNS Server (DNSS) Foreign NetworkHome Network Home Agent (HA) Web Server (WS) RDNSS : Recursive DNS Server

5IETF56 DNSOP WG Current DNS service scenario (2/2) : Dog-legged DNS name resolution Internet Mobility Anchor Point (MAP) RDNSS2 DNS Server (DNSS) Foreign NetworkHome Network Home Agent (HA) Web Server (WS) MN 2 RDNSS : Recursive DNS Server

6IETF56 DNSOP WG Suggested DNS service scenario : Optimization of DNS name resolution Internet Mobility Anchor Point (MAP) RDNSS2 DNS Server (DNSS) Foreign NetworkHome Network Home Agent (HA) Web Server (WS) MN 2 4 RDNSS : Recursive DNS Server

7IETF56 DNSOP WG Next steps The next step of the draft –Add solicited DNS discovery Through RS message that solicits the address of recursive DNS server placed in the visited network. –Consideration of extension to mobile IPv6 Is this draft valuable to discuss as dnsop wg draft?