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Apparatus for converting IPv4 to IPv6 using dual stack and method thereof

  • US 20040162909A1
  • Filed: 02/17/2004
  • Published: 08/19/2004
  • Est. Priority Date: 02/18/2003
  • Status: Abandoned Application
First Claim
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1. An apparatus for converting Internet protocol version 4 to Internet protocol version 6 using a dual stack comprising:

  • a dual stack transition mechanism server for converting a domain names service query message that inquires an Internet protocol version 4 address of a dual stack transition mechanism host received from an Internet protocol version 4 domain names service server to a domain names service query message which requests both Internet protocol version 4 address and Internet protocol version 6 address and then transmitting the converted message to said Internet protocol version 6 domain names service server, assigning an arbitrary Internet protocol version 4 address to said dual stack transition mechanism host and storing the assigned Internet protocol version 4 address in the host when receiving a domain names service response message including Internet protocol version 6 address information of said dual stack transition mechanism host only from said Internet protocol version 6 domain names service server, registering the assigned Internet protocol version 4 address in said Internet protocol version 6 domain names service server and informing said dual stack transition mechanism host of it, and transmitting a domain names service response message including the assigned Internet protocol version 4 address to the Internet protocol version 4 domain names service server; and

    a dual stack transition mechanism tunneling end point for decapsulating data which are Internet protocol version 4-over-Internet protocol version 6 tunneled from said dual stack transition mechanism server or said dual stack transition mechanism host and transmitting the decapsulated data as an Internet protocol version 4 packet to said Internet protocol version 4 domain names service server or said Internet protocol version 4 host, and when receiving the Internet protocol version 4 packet from the Internet protocol version 4 domain names service server or said Internet protocol version 4 host, referring to a mapping table which is held and managed by itself, encapsulating the packet and performing an Internet protocol version 4-over-Internet protocol version 6 tunneling to deliver the packet to said dual stack transition mechanism server or said dual stack transition mechanism host.

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