Clients get DNS timeouts because ipv6 means more queries for each lookup

Mark Andrews marka at isc.org
Mon Jul 11 22:52:01 UTC 2011


In message <4E1B562B.2070407 at kamens.us>, Jonathan Kamens writes:
> 
> On 7/11/2011 3:26 PM, Eivind Olsen wrote:
> > I think the main issue here is - why is your nameserver thinking it has=
> 
> > IPv6 connectivity?
> No, this isn't the issue.
> 
> I see the FORMERR errors in syslog and the timeouts resolving host names =
> 
> even when I start named with -4.

-4 and -6 affect what transport is used.  They have no impact on data.

> Named is querying for AAAA records even when it is started with -4, and=20
> it is the querying, not the connectivity, that is the issue.
> 
>    jik
> 
> 
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>     On 7/11/2011 3:26 PM, Eivind Olsen wrote:
>     <blockquote
>       cite=3D"mid:43d661f35b8a94b70c2e3eddf6a29027.squirrel at webmail.amino=
> r.no"
>       type=3D"cite">
>       <pre wrap=3D"">
> I think the main issue here is - why is your nameserver thinking it has
> IPv6 connectivity?</pre>
>     </blockquote>
>     No, this isn't the issue.<br>
>     <br>
>     I see the FORMERR errors in syslog and the timeouts resolving host
>     names even when I start named with -4.<br>
>     <br>
>     Named is querying for AAAA records even when it is started with -4,
>     and it is the querying, not the connectivity, that is the issue.<br>
>     <br>
>       jik<br>
>     <br>
>   </body>
> </html>
> 
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Mark Andrews, ISC
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PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org



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