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Group:  English: Windows Server » microsoft.public.windows.server.dns
Thread: DNS failover

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DNS failover
"Readr" <carl[ at ]anywhere.com> 11/1/2008 9:36:20 PM
I am looking for a paper or diagram on how dns works at the transport layer.
I had a situation where one site had a failed connection and a dns server
that couldnt resolve names
as it couldnt reach its forwarders therefore had no recursion. there was a
second connection
with another dns server which was able to resolve ip request. Because the
1st dns was up the clients all sent it the
requests and it returned a timeout. what would be the best method to have
the clients get dns from the 2nd dns server even if the 1st is up. I know
it sounds odd, but its the best I can explain this situation

Fedo



Re: DNS failover
Meinolf Weber <meiweb(nospam)[ at ]gmx.de> 11/1/2008 9:45:13 PM
Hello Readr,

If you have multiple DNS servers the clients use the preferred set on the
NIC first. So if this is reachable they will not use another DNS server.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


[Quoted Text]
> I am looking for a paper or diagram on how dns works at the transport
> layer.
> I had a situation where one site had a failed connection and a dns
> server
> that couldnt resolve names
> as it couldnt reach its forwarders therefore had no recursion. there
> was a
> second connection
> with another dns server which was able to resolve ip request. Because
> the
> 1st dns was up the clients all sent it the
> requests and it returned a timeout. what would be the best method to
> have
> the clients get dns from the 2nd dns server even if the 1st is up.
> I know
> it sounds odd, but its the best I can explain this situation
> Fedo
>

Re: DNS failover
"Readr" <carl[ at ]anywhere.com> 11/1/2008 11:51:57 PM
Thats what I was affraid of. Is there a way to get the client to use the
second if there is a timeout or noname resolution?


"Meinolf Weber" <meiweb(nospam)[ at ]gmx.de> wrote in message
news:ff16fb66ca938cb0a8aa320c149[ at ]msnews.microsoft.com...
[Quoted Text]
> Hello Readr,
>
> If you have multiple DNS servers the clients use the preferred set on the
> NIC first. So if this is reachable they will not use another DNS server.
>
> Best regards
>
> Meinolf Weber
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
> ** Please do NOT email, only reply to Newsgroups
> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>
>> I am looking for a paper or diagram on how dns works at the transport
>> layer.
>> I had a situation where one site had a failed connection and a dns
>> server
>> that couldnt resolve names
>> as it couldnt reach its forwarders therefore had no recursion. there
>> was a
>> second connection
>> with another dns server which was able to resolve ip request. Because
>> the
>> 1st dns was up the clients all sent it the
>> requests and it returned a timeout. what would be the best method to
>> have
>> the clients get dns from the 2nd dns server even if the 1st is up.
>> I know
>> it sounds odd, but its the best I can explain this situation
>> Fedo
>>
>
>


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