Re: Why adding secondary IP to NIC of DNS servers failed ?

From a member server MyAppserver which experienced the DNS resolution issues
after DNS01 and DNS02 got the additional IP 1.x.x.x added to the NIC:

Advanved TCP/IP Settings

DNS Server addresses
200.1.1.2 (note it is pointing to the original DNS IP address)
200.1.1.1


As you can see the member servers were not touched. All I did was adding the
1.x.x.x. IPs to the TCP/IP properties on the respective DNS Servers and let
the new IP's ready for people to use them if they wanted, while letting the
original 200.x.x.x IP's coexist for few days.




"Jorge Silva" <jorgesilva_pt@xxxxxxxxxxx> wrote in message
news:%23i6uMzYtGHA.1216@xxxxxxxxxxxxxxxxxxxxxxx
Hi

I hope that you don't mind for me to step in.

I just want to add something:
Check if you have under the dns properties:
netmask ordering selected on advanced tab, and under the interfaces tab if
you have listen for both ipaddress.

--
I hope that the information above helps you

Good Luck
Jorge Silva
MCSA
Systems Administrator

"Greg Lindsay [MSFT]" <greg.lindsay@xxxxxxxxxxxxx> wrote in message
news:OwOQYWYtGHA.1216@xxxxxxxxxxxxxxxxxxxxxxx
You mean it is input manually with different subnets for DNS and
IP/gateway? When you correct it, does it stay corrected, or return to the
previous values?

I've not heard of this sort of problem before, but perhaps someone else
has. If it's happening on more than one machine, I still think it might
be related to the new DHCP server test. Is it possible that someone else
was messing with the settings?

--
Greg Lindsay [MSFT]
greg.lindsay@xxxxxxxxxxxxx

Disclaimer: This posting is provided "AS IS" with no warranties, and
confers no rights.

"Marlon Brown" <MarlonBrown@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:O3crZ5XtGHA.4140@xxxxxxxxxxxxxxxxxxxxxxx
I know, but in this case, both IP and DNS information has been input
manually. Any idea what could have caused this ?


"Greg Lindsay [MSFT]" <greg.lindsay@xxxxxxxxxxxxx> wrote in message
news:eVDzAkPtGHA.4748@xxxxxxxxxxxxxxxxxxxxxxx
Configuration of the TCP/IP settings for IP address and DNS are
independent. You can have a static IP address, but still select "Obtain
DNS server address automatically", and vice-versa.

Make sure you have both set to static (and have the correct addresses)
if you aren't using DHCP. Later when you switch to DHCP, make sure to
switch both again.

I hope this helps!

--
Greg Lindsay [MSFT]
greg.lindsay@xxxxxxxxxxxxx

Disclaimer: This posting is provided "AS IS" with no warranties, and
confers no rights.

"Marlon Brown" <MarlonBrown@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:umpOAKPtGHA.4140@xxxxxxxxxxxxxxxxxxxxxxx
On MyApplicationServer on the network 1.0.0.0, here is the IP address
configuration:
The servers which freaked out are all under static IP address
configuration. It is true folks are testing a new DHCP server on given
networks, but since our servers point to static IP address, I think
that is unrelated.


DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 1.0.0.200
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 1.0.0.254
DNS Servers . . . . . . . . . . . : 200.1.1.2 (note it is pointing to
the original DNS IP address)
200.1.1.1
Primary WINS Server . . . . . Wrong IP ( I don't think this is
related to the DNS issue, but I noticed that WINS IP existing there is
invalid)
Secondary WINS Server . . . Wrong IP







"Greg Lindsay [MSFT]" <greg.lindsay@xxxxxxxxxxxxx> wrote in message
news:u4%23nqnOtGHA.4968@xxxxxxxxxxxxxxxxxxxxxxx
Are the people on other networks using a different DHCP server?

What is the order of the preferred DNS servers being sent to clients
on the 200.1.1.x network?

--
Greg Lindsay [MSFT]
greg.lindsay@xxxxxxxxxxxxx

Disclaimer: This posting is provided "AS IS" with no warranties, and
confers no rights.

"Marlon Brown" <MarlonBrown@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message news:ea3NWiLtGHA.1888@xxxxxxxxxxxxxxxxxxxxxxx
This is the situation:

DNS-ADI-WINS1 = IP=200.1.1.1
DNS-ADI-WINS2 = IP=200.1.1.2

I will have to replace DNS-ADI-WINS1 IP addresses by IP=1.0.0.1 and
1.0.0.2 respectively.
What I did:

I added the IP addresses to the NIC of the DNS servers. That way
addresses 200.1.1.1 and 1.0.0.1 coexist. I did that so people could
start updating firewall rules, static member server IP addresses,
DHCP scope to point to the new DNS IP addresses 10.0.0.x. At
scheduled date I would remove the 200.1.1.1 addresses from the NIC
of the respective DNS-ADI-WINS servers.

Problem:
After adding the secondary 1.x.x.x IP addresses to the DNS servers
TCP/IP properties, people with servers on the specific network
200.1.1.x experienced problems with server resolution. All servers
on 200.1.1.1 was unable to successfully return nslookup queries and
locate DNS resources.
Can someone explain what could be causing this ? Servers on other
networks performed OK, only the ones on the same network than the
DNS servers
















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