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The Autoconfiguration of Recursive DNS Server and the Optimization of DNS Name Resolution in Hierarchical Mobile IPv6. draft-jeong-hmipv6-dns-optimization-00.txt. Jae-Hoon Jeong , Jung-Soo Park, Kyeong-Jin Lee, Hyoung-Jun Kim ETRI 18 th March 2003

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The Autoconfiguration of Recursive DNS Server and the Optimization of DNS Name Resolution in Hierarchical Mobile IPv6

draft-jeong-hmipv6-dns-optimization-00.txt

Jae-Hoon Jeong, Jung-Soo Park, Kyeong-Jin Lee, Hyoung-Jun Kim

ETRI18th March 2003

56th IETF – San Francisco, California, USApaul@etri.re.kr

IETF56 DNSOP WG

motivation of the draft
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.

IETF56 DNSOP WG

idea of the draft
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.

IETF56 DNSOP WG

current dns service scenario 1 2

RDNSS1

Current DNS service scenario (1/2)

DNS Server

(DNSS)

Web Server(WS)

RDNSS : Recursive DNS Server

3

Internet

Home Agent(HA)

Mobility Anchor Point(MAP)

2

5

1

RDNSS2

4

MN

Home Network

Foreign Network

IETF56 DNSOP WG

current dns service scenario 2 2 dog legged dns name resolution

RDNSS1

Current DNS service scenario (2/2): Dog-legged DNS name resolution

DNS Server

(DNSS)

Web Server(WS)

RDNSS : Recursive DNS Server

3

Internet

Home Agent(HA)

Mobility Anchor Point(MAP)

2

5

4

RDNSS2

1

MN

Home Network

Foreign Network

IETF56 DNSOP WG

suggested dns service scenario optimization of dns name resolution

RDNSS1

Suggested DNS service scenario : Optimization of DNS name resolution

DNS Server

(DNSS)

Web Server(WS)

RDNSS : Recursive DNS Server

3

Internet

Home Agent(HA)

Mobility Anchor Point(MAP)

5

2

1

RDNSS2

4

MN

Home Network

Foreign Network

IETF56 DNSOP WG

next steps
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?

IETF56 DNSOP WG