Hi all,

We have two DNS servers and users get two DNS servers IP from DHCP. If
users go to www.microsoft.com, which DNS server IP do users use? users use
both or one of them? If I do sniffering, should I see both IP when users
lauch web site or one of them? Windows 2003 R2

Thank you.

Hi

If you mean the prefferred and alternative addresses then AFAIK they will
always use their preferred server unless for some reason that fails to
respond with a specified time out period (dont know what that is though or if
its configurable)

I would assume you should only see one DNS server (the preferred) responding
in a network trace(assuming it didnt time out) why is this not the result you
get?

Simon



John wrote:
>Hi all,
>
>We have two DNS servers and users get two DNS servers IP from DHCP. If
>users go to www.microsoft.com, which DNS server IP do users use? users use
>both or one of them? If I do sniffering, should I see both IP when users
>lauch web site or one of them? Windows 2003 R2
>
>Thank you.

--
Message posted via http://www.winserverkb.com

> If you mean the prefferred and alternative addresses
YES.

But, when I do a trace, it show two DNS servers IP for query
www.microsoft.com. Is this somethng wrong with it?

We experienced internet page loading slowly. Could it be a issue?

"simon via WinServerKB.com" wrote:

> Hi
>
> If you mean the prefferred and alternative addresses then AFAIK they will
> always use their preferred server unless for some reason that fails to
> respond with a specified time out period (dont know what that is though or if
> its configurable)
>
> I would assume you should only see one DNS server (the preferred) responding
> in a network trace(assuming it didnt time out) why is this not the result you
> get?
>
> Simon
>
>
>
> John wrote:
> >Hi all,
> >
> >We have two DNS servers and users get two DNS servers IP from DHCP. If
> >users go to www.microsoft.com, which DNS server IP do users use? users use
> >both or one of them? If I do sniffering, should I see both IP when users
> >lauch web site or one of them? Windows 2003 R2
> >
> >Thank you.
>
> --
> Message posted via http://www.winserverkb.com
>
>

"John" <John@discussions.microsoft.com> wrote in message
news:79CDAB74-1024-4F30-AE1A-7FC4E0DEC49B@microsoft.com...
>> If you mean the prefferred and alternative addresses
> YES.
>
> But, when I do a trace, it show two DNS servers IP for query
> www.microsoft.com. Is this somethng wrong with it?

If one is failing (or slow) it will show the alteranate.

> We experienced internet page loading slowly. Could it be a issue?

Probably not, since for the page to load DNS much be working but
it could theorectically be working SLOWLY and thus making pages
load slowly.

Show us your UNEDITED text from "IPconfig /all" for a machine with
the problem, and perhaps the full output of that NSLookup command
that troubled you.


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

> "simon via WinServerKB.com" wrote:
>
>> Hi
>>
>> If you mean the prefferred and alternative addresses then AFAIK they will
>> always use their preferred server unless for some reason that fails to
>> respond with a specified time out period (dont know what that is though
>> or if
>> its configurable)
>>
>> I would assume you should only see one DNS server (the preferred)
>> responding
>> in a network trace(assuming it didnt time out) why is this not the result
>> you
>> get?
>>
>> Simon
>>
>>
>>
>> John wrote:
>> >Hi all,
>> >
>> >We have two DNS servers and users get two DNS servers IP from DHCP. If
>> >users go to www.microsoft.com, which DNS server IP do users use? users
>> >use
>> >both or one of them? If I do sniffering, should I see both IP when
>> >users
>> >lauch web site or one of them? Windows 2003 R2
>> >
>> >Thank you.
>>
>> --
>> Message posted via http://www.winserverkb.com
>>
>>

Thank you very much. I just want to rule out which DNS servers could cause
internet page loading slowly.
Please see the result as you requested.

C:\Documents and Settings\>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : testcomputer
Primary Dns Suffix . . . . . . . : eu.test.local
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : eu.test.local
eu.test.local
test.local

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : eu.test.local
Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network
Connecti
on
Physical Address. . . . . . . . . : 00-03-47-C6-6F-57
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.90.9
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :192.168.90.252
DHCP Server . . . . . . . . . . . : 192.168.10.111
DNS Servers . . . . . . . . . . . : 192.168.10.111
192.168.10.112
Primary WINS Server . . . . . . . : 192.168.10.111
Lease Obtained. . . . . . . . . . : Monday, June 18, 2007 5:00:17 PM
Lease Expires . . . . . . . . . . : Monday, June 25, 2007 5:00:17 PM

C:\Documents and Settings>nslookup -qtype=all microsoft.com
Server: testdns1.eu.test.local
Address: 192.168.10.111

Non-authoritative answer:
microsoft.com internet address = 207.46.232.182
microsoft.com internet address = 207.46.197.32
microsoft.com MX preference = 10, mail exchanger = maila.microsoft.com
microsoft.com MX preference = 10, mail exchanger = mailb.microsoft.com
microsoft.com MX preference = 10, mail exchanger = mailc.microsoft.com

mailb.microsoft.com internet address = 205.248.106.30
mailb.microsoft.com internet address = 131.107.115.215
mailc.microsoft.com internet address = 131.107.115.214
mailc.microsoft.com internet address = 205.248.106.32
maila.microsoft.com internet address = 205.248.106.64
maila.microsoft.com internet address = 131.107.115.212

"Herb Martin" wrote:

>
> "John" <John@discussions.microsoft.com> wrote in message
> news:79CDAB74-1024-4F30-AE1A-7FC4E0DEC49B@microsoft.com...
> >> If you mean the prefferred and alternative addresses
> > YES.
> >
> > But, when I do a trace, it show two DNS servers IP for query
> > www.microsoft.com. Is this somethng wrong with it?
>
> If one is failing (or slow) it will show the alteranate.
>
> > We experienced internet page loading slowly. Could it be a issue?
>
> Probably not, since for the page to load DNS much be working but
> it could theorectically be working SLOWLY and thus making pages
> load slowly.
>
> Show us your UNEDITED text from "IPconfig /all" for a machine with
> the problem, and perhaps the full output of that NSLookup command
> that troubled you.
>
>
> --
> Herb Martin, MCSE, MVP
> http://www.LearnQuick.Com
> (phone on web site)
>
> > "simon via WinServerKB.com" wrote:
> >
> >> Hi
> >>
> >> If you mean the prefferred and alternative addresses then AFAIK they will
> >> always use their preferred server unless for some reason that fails to
> >> respond with a specified time out period (dont know what that is though
> >> or if
> >> its configurable)
> >>
> >> I would assume you should only see one DNS server (the preferred)
> >> responding
> >> in a network trace(assuming it didnt time out) why is this not the result
> >> you
> >> get?
> >>
> >> Simon
> >>
> >>
> >>
> >> John wrote:
> >> >Hi all,
> >> >
> >> >We have two DNS servers and users get two DNS servers IP from DHCP. If
> >> >users go to www.microsoft.com, which DNS server IP do users use? users
> >> >use
> >> >both or one of them? If I do sniffering, should I see both IP when
> >> >users
> >> >lauch web site or one of them? Windows 2003 R2
> >> >
> >> >Thank you.
> >>
> >> --
> >> Message posted via http://www.winserverkb.com
> >>
> >>
>
>
>

"John" <John@discussions.microsoft.com> wrote in message
news:7F616CF9-C0E0-48CA-B3AD-25DC5206BA4F@microsoft.com...
> Thank you very much. I just want to rule out which DNS servers could
> cause
> internet page loading slowly.
> Please see the result as you requested.
>
> C:\Documents and Settings\>ipconfig /all
>
> Windows IP Configuration
>
> Host Name . . . . . . . . . . . . : testcomputer
> Primary Dns Suffix . . . . . . . : eu.test.local
> Node Type . . . . . . . . . . . . : Hybrid
> DNS Suffix Search List. . . . . . : eu.test.local
> eu.test.local

No point in putting eu.text.local in the explicit search
list -- just use the setting for searching parents and you
will get it and test.local (once each.)

(Not a serious problem, though it might slow you a LITTLE.)

> test.local
> Connection-specific DNS Suffix . : eu.test.local

No reason for a connection specific suffix since you have already set
this CORRECTLY in the System Control Panel as the Primary DNS
suffix -- leave this blank. (Not a serious problem though.)

> Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network
> Connecti
> on
> Physical Address. . . . . . . . . : 00-03-47-C6-6F-57
> Dhcp Enabled. . . . . . . . . . . : Yes
> Autoconfiguration Enabled . . . . : Yes
> IP Address. . . . . . . . . . . . : 192.168.90.9
> Subnet Mask . . . . . . . . . . . : 255.255.255.0
> Default Gateway . . . . . . . . . :192.168.90.252
> DHCP Server . . . . . . . . . . . : 192.168.10.111
> DNS Servers . . . . . . . . . . . : 192.168.10.111
> 192.168.10.112

As long as 111 and 112 can BOTH resolve all internal (and external) names
the above is correct.

> C:\Documents and Settings>nslookup -qtype=all microsoft.com

You don't need to type anything after the "-q", or you can use the
switch -type=
(Not a serious problem though.)

> Server: testdns1.eu.test.local
> Address: 192.168.10.111
>
> Non-authoritative answer:
> microsoft.com internet address = 207.46.232.182
> microsoft.com internet address = 207.46.197.32
> microsoft.com MX preference = 10, mail exchanger = maila.microsoft.com
> microsoft.com MX preference = 10, mail exchanger = mailb.microsoft.com
> microsoft.com MX preference = 10, mail exchanger = mailc.microsoft.com
>
> mailb.microsoft.com internet address = 205.248.106.30
> mailb.microsoft.com internet address = 131.107.115.215
> mailc.microsoft.com internet address = 131.107.115.214
> mailc.microsoft.com internet address = 205.248.106.32
> maila.microsoft.com internet address = 205.248.106.64
> maila.microsoft.com internet address = 131.107.115.212

The above looks perfectly normal. You asked for everything (all) about
microsoft.com and so resolved the A records, MX, and NS records
with this name.

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