Re: [dhcwg] Re: WG last call on draft-ietf-dhc-dhcpv6-opt-dnsconfig-02.txt

On Friday, February 21, 2003, at 04:56  AM, Ralph Droms wrote:

> Regarding unpredictable, difficult to debug behavior (see end of 
> quoted text)...
>
> Shouldn't the host receive the same answer to a DNS query, regardless 
> of the resolver to which the query is sent?  If so, the order in which 
> resolvers are used by the host shouldn't matter.

There might be performance/security issues.

>
> What is done today in the deployed IPv6 world in a host that has both 
> an IPv6 stack and an IPv4 stack, and a manually configured list of DNS 
> resolvers?  Is it allowed to mix together IPv6 and IPv4 addresses for 
> resolvers?

Yes, in /etc/resolv.conf

>  Is that configuration actually used?

Yes

> Does the host have two lists: one for IPv6 and one for IPv4?

No, one list which include either v4 or v6 addreses
>
> Suppose the host only has an IPv6 stack but both IPv6 and IPv4 
> addresses in its list of DNS resolvers?

then obviously it should ignore the v4 one, the same way a v4-only host
should ignore AAAA records.

> I'm hoping we can get some real-world deployment experience injected 
> into the conversation...
>
> - Ralph

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