In my DHCP settings, I have created six DNS servers. Will my clients
actually use all six, or is there a limit to how many are actually used?

Hello bookermgt@discussions.microsoft.com,

The client will always use the preferred DNS, if I am right from DHCP options,
it will be the first in the list. It will only use another DNS server if
the preferred is not available.

Best regards

Meinolf Weber (Myweb)
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.

> In my DHCP settings, I have created six DNS servers. Will my clients
> actually use all six, or is there a limit to how many are actually
> used?
>

They will have the possibility to use all 6 - they will have the list of all
6. If first is not responding next one is and so on.

"booker@mgt" <bookermgt@discussions.microsoft.com> wrote in message
news:8492FAAA-610F-499D-AE27-8C9471A16591@microsoft.com...
> In my DHCP settings, I have created six DNS servers. Will my clients
> actually use all six, or is there a limit to how many are actually used?
>
>

"Meinolf Weber (Myweb)" <meiweb@gmx.de> wrote in message
news:ff16fb664ea208c9b4a3007c4370@msnews.microsoft .com...
> Hello bookermgt@discussions.microsoft.com,
>
> The client will always use the preferred DNS, if I am right from DHCP
> options, it will be the first in the list.

This is incorrect or at least misleading but Meinolf you likely understand
it
as you go on to say below:

> It will only use another DNS server if the preferred is not available.

The client will PREFER the "Preferred" or First listed server but it will
use the next etc if the preferred is unavailable OR perhaps if the first is
merely slow to answer.

Clients will also tend to "latch on" or "stick to" the server that is
currently
working EVEN IF the Preferred Server becomes available (or faster)
again -- until a reboot or until an arbitrary time passes and it finds the
original preferred DNS server.


Also for the original poster:

Likely the question real question is will it use "each one" for an address
that is not found in the earlier servers, which it will NOT do.

Clients will use AT MOST ONE DNS server, usually the preferred, IF
it answers.

That is, clients will not try Server1 and if the name isn't found move on to
Server2.

Once ANY DNS Server answers the client will presume that every other
DNS server (in the world) will return the exact same answer, even a Negative
(not found) answer.



--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com (phone on web site)

If you use LinkedIn then tell me where you know me from when linking:

http://www.linkedin.com/in/herbmartin

In news:fan7ia$r76$1@registered.motzarella.org,
Luka Manojlovic <luka@news.manojlovic.net> typed:
> They will have the possibility to use all 6 - they will have the list
> of all 6. If first is not responding next one is and so on.
>

Unfortunately, the resolver service algorithm does not work that way. Herb
provided some info on why. These articles should also explain further.

261968 - Explanation of the Server List Management Feature in the Domain
Name Resolver Client:
http://support.microsoft.com/?id=261968

Windows 2000 DNS (True for XP as well - For Client Side Behavior info scroll
down to Name Resolution):
http://www.microsoft.com/technet/pro...n/w2kdns2.mspx

--
Regards,
Ace

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT,
MVP Microsoft MVP - Directory Services
Microsoft Certified Trainer

Infinite Diversities in Infinite Combinations

Having difficulty reading or finding responses to your post?
Try using Outlook Express or any other newsreader, configure a news
account, and point it to news.microsoft.com. Anonymous access. It's
easy and it's free:

How to Configure OEx for Internet News
http://support.microsoft.com/?id=171164

"Life isn't like a box of chocolates or a bowl of cherries or
peaches... Life is more like a jar of jalapenos. What you do today
may burn your butt tomorrow." - Garfield

Thanks,
One of the main tones I got out of this discussion is that there is no harm
in listing six, but that it will not use all six. I will read the links to
ge ta more thorough understanding.

Thanks



"Ace Fekay [MVP]" wrote:

> In news:fan7ia$r76$1@registered.motzarella.org,
> Luka Manojlovic <luka@news.manojlovic.net> typed:
> > They will have the possibility to use all 6 - they will have the list
> > of all 6. If first is not responding next one is and so on.
> >
>
> Unfortunately, the resolver service algorithm does not work that way. Herb
> provided some info on why. These articles should also explain further.
>
> 261968 - Explanation of the Server List Management Feature in the Domain
> Name Resolver Client:
> http://support.microsoft.com/?id=261968
>
> Windows 2000 DNS (True for XP as well - For Client Side Behavior info scroll
> down to Name Resolution):
> http://www.microsoft.com/technet/pro...n/w2kdns2.mspx
>
> --
> Regards,
> Ace
>
> This posting is provided "AS-IS" with no warranties or guarantees and
> confers no rights.
>
> Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT,
> MVP Microsoft MVP - Directory Services
> Microsoft Certified Trainer
>
> Infinite Diversities in Infinite Combinations
>
> Having difficulty reading or finding responses to your post?
> Try using Outlook Express or any other newsreader, configure a news
> account, and point it to news.microsoft.com. Anonymous access. It's
> easy and it's free:
>
> How to Configure OEx for Internet News
> http://support.microsoft.com/?id=171164
>
> "Life isn't like a box of chocolates or a bowl of cherries or
> peaches... Life is more like a jar of jalapenos. What you do today
> may burn your butt tomorrow." - Garfield
>
>
>

In news:C94DDAED-F49D-42E1-A2DB-3C4D53CD8774@microsoft.com,
booker@mgt <bookermgt@discussions.microsoft.com> typed:
> Thanks,
> One of the main tones I got out of this discussion is that there is
> no harm in listing six, but that it will not use all six. I will
> read the links to ge ta more thorough understanding.
>
> Thanks
>

That's correct. Depending on the circumstances, it may not even go past the
first.


Ace

"booker@mgt" <bookermgt@discussions.microsoft.com> wrote in message
news:C94DDAED-F49D-42E1-A2DB-3C4D53CD8774@microsoft.com...
> Thanks,
> One of the main tones I got out of this discussion is that there is no
> harm
> in listing six, but that it will not use all six. I will read the links
> to
> ge ta more thorough understanding.

No harm except that it is PROBABLY a waste of (your) time after the first
few.

And it will "not use" all of them as long as an EARLIER one in the list is
"alive".


--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com (phone on web site)

If you use LinkedIn then tell me where you know me from when linking:
http://www.linkedin.com/in/herbmartin


> Thanks
>
>
>
> "Ace Fekay [MVP]" wrote:
>
>> In news:fan7ia$r76$1@registered.motzarella.org,
>> Luka Manojlovic <luka@news.manojlovic.net> typed:
>> > They will have the possibility to use all 6 - they will have the list
>> > of all 6. If first is not responding next one is and so on.
>> >
>>
>> Unfortunately, the resolver service algorithm does not work that way.
>> Herb
>> provided some info on why. These articles should also explain
>> further.
>>
>> 261968 - Explanation of the Server List Management Feature in the Domain
>> Name Resolver Client:
>> http://support.microsoft.com/?id=261968
>>
>> Windows 2000 DNS (True for XP as well - For Client Side Behavior info
>> scroll
>> down to Name Resolution):
>> http://www.microsoft.com/technet/pro...n/w2kdns2.mspx
>>
>> --
>> Regards,
>> Ace
>>
>> This posting is provided "AS-IS" with no warranties or guarantees and
>> confers no rights.
>>
>> Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT,
>> MVP Microsoft MVP - Directory Services
>> Microsoft Certified Trainer
>>
>> Infinite Diversities in Infinite Combinations
>>
>> Having difficulty reading or finding responses to your post?
>> Try using Outlook Express or any other newsreader, configure a news
>> account, and point it to news.microsoft.com. Anonymous access. It's
>> easy and it's free:
>>
>> How to Configure OEx for Internet News
>> http://support.microsoft.com/?id=171164
>>
>> "Life isn't like a box of chocolates or a bowl of cherries or
>> peaches... Life is more like a jar of jalapenos. What you do today
>> may burn your butt tomorrow." - Garfield
>>
>>
>>