RFC 3646 (rfc3646) - Page 2 of 7


DNS Configuration options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)



Alternative Format: Original Text Document



RFC 3646          DNS Configuration Options for DHCPv6     December 2003


3.  DNS Recursive Name Server option

   The DNS Recursive Name Server option provides a list of one or more
   IPv6 addresses of DNS recursive name servers to which a client's DNS
   resolver MAY send DNS queries [1].  The DNS servers are listed in the
   order of preference for use by the client resolver.

   The format of the DNS Recursive Name Server option is:

    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_DNS_SERVERS       |         option-len            |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                                                               |
   |            DNS-recursive-name-server (IPv6 address)           |
   |                                                               |
   |                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                                                               |
   |            DNS-recursive-name-server (IPv6 address)           |
   |                                                               |
   |                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                              ...                              |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   option-code:               OPTION_DNS_SERVERS (23)

   option-len:                Length of the list of DNS recursive name
                              servers in octets; must be a multiple of
                              16

   DNS-recursive-name-server: IPv6 address of DNS recursive name server

4.  Domain Search List option

   The Domain Search List option specifies the domain search list the
   client is to use when resolving hostnames with DNS.  This option does
   not apply to other name resolution mechanisms.











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