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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