On Thursday, July 17, 2003, at 05:42 PM, Jaehoon Jeong wrote:
In current Cisco router, we configure the addresses of recursive DNS servers for its own name resolution.
Therefore, the DNS servers' addresses have already been configured. We only have to use the information
so as to announce DNS information through RA message.
You could do the very same thing using DHCPv6-lite. The information is there,
it is flowing from the router to the node downstream, in a push or pull mode.
It really is just a question of packet format. Using the multicast extension
to DHCPv6-lite I suggested few days ago, there isn't really any difference
between the 2 approaches with regard to pass the DNS recursive server address.
The advantage of the DHCPv6 approach is that you can pass other configuration
information, like the address of the NTP server.
I think DNS discovery is indispensible in IPv6, as you know. RA camp including me continues to appeal
the need of RA-based DNS discovery for IPv6 working more flexibly even in the environment
where there is no DHCPv6.
The RA camp keeps making the false assumption that using the DHCPv6-lite protocol to do this
requires to have a big-iron DHCPv6 server on the network. This simply is not true.
- Alain.
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