Dual-stack BIND resolver behaviour

Sherin George list at sheringeorge.co.cc
Thu May 19 05:55:32 UTC 2011


Hi guys,

I found the answer myself.

If anyone interested, please see following PDF.

http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6553/aag_c45-625513.pdf

--
Regards,
Sherin

On Thu, May 19, 2011 at 11:09 AM, Sherin George <list at sheringeorge.co.cc> wrote:
> Hi guys,
>
> i am not sure whether this is the right place to ask this question,
> but I sincerely feel that my question matches with ongoing discussion
> in this thread. If you think that I have hijacked thread, I am
> extremely sorry.
>
> Well, my questions are,
>
> 1. Can a domain(eg: example.com) have both A reocrd & AAAA record
> 2. If so, which website will be displayed when accessed from a client
> which got both IPv4 & IPV6 connectivity
>
> --
> Regards,
> Sherin
>
>
>
> On Mon, May 16, 2011 at 6:28 PM,  <lst_hoe02 at kwsoft.de> wrote:
>> Zitat von Anand Buddhdev <anandb at ripe.net>:
>>
>>> On 16/05/2011 14:11, Dennis Perisa wrote:
>>>
>>>> Hi folks,
>>>>
>>>> We are looking to dual-stack our 9.7.3 DNS resolvers and I had a
>>>> question about BIND's behaviour in a dual-stack configuration.
>>>>
>>>> Assuming the resolver's cache is empty, will a query that arrives on
>>>> an IPv6 socket always result in an outgoing query to a root server's
>>>> IPv6 address? I have the same question for IPv4 queries.
>>>
>>> Hi Dennis,
>>>
>>> There's no relation between incoming recursive queries, and the outgoing
>>> queries BIND makes to look for answers.
>>>
>>> Whether BIND contacts the IPv4 or IPv6 address of a server (including
>>> the root servers) depends on the latency to that server.
>>
>> Does the latency apply per IP or per Hostname? If per Hostname the IPv6
>> address will be prefered in case the root servers are reachable by both IPv4
>> and IPv6, no? Also first connection will be tried with IPv6 on most OS, no?
>>
>> Regards
>>
>> Andreas
>>
>>
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>>
>



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