ASSIGN DNS THRU DHCP

[Guest]

I have put a new DNS Server on my Windows 2000 network. I have gone to DHCP
and placed the new DNS server IP in scope options as Primary DNS. I still
cannot get clients to pick up the new DNS server after doing release and
renew. What am I missing? Thanks.

 

[Frankster]

Are your clients' TCPIP properties configured to "assign DNS automatically"?

-Frank

 

[Herb Martin]

Are your clients' TCPIP properties configured to "assign DNS

automatically"?


Or on older clients, is the DNS server Preferred (and alternate)
field(s) blank.

More recent machines have the actual checkbox Frankster
references, but the older clients just allow you to fill out
the client setting which overrides the DHCP provided
values.

 

[Jeff Brandon \(Home Email\)]

Have you assigned the new DNS server in the Server options or the Scope
options of DHCP?

 

[Guest]

To andswer all your questions:
1. Yes, all my clients receive DNS automatically, through TCP/IP properties
2. I don't really have any "older clients". All of our clients are at least
Win 2K SP4 or XP Pro. The DNS servers field in TCP/IP still has the old
primary DNS server in it.
3. In DHCP I used scope options to set the DNS server

Thanks for your replies so far.

 

[Guest]

Now I have set the new Primary DNS server in DHCP>Server Options as well as
scope options, and still cannot pick up the right DNS server through
release/renew.

 

[Frankster]

Too obvious maybe, but, can you ping the new DNS server IP from the
workstations?

-Frank

 

[Guest]

Yes, I can ping it, and in fact, DNS works great on it if i manually set a
client to use that DNS server. However, I have over 60 clients, and I do not
want to have to do that. I know it should be able to pick up through DHCP, I
just can't see whats missing in my set up. Thanks.

 

[Herb Martin]

Yes, I can ping it, and in fact, DNS works great on it if i manually set a
client to use that DNS server. However, I have over 60 clients, and I do not
want to have to do that. I know it should be able to pick up through DHCP, I
just can't see whats missing in my set up. Thanks.

Have you physically checked the clients to ensure
they don't have MANUAL DNS server settings?

The manual settings for such options override the
DHCP supplied options. Many people don't realize
that manual settings are even possible on DHCP
clients.

Go to an affected client and check this. Also perform
nslookup test with the SPECIFIC DNS server to ensure
that the clients are able to reach the DNS with DNS
requests and not just ping.

 

[Kevin D. Goodknecht Sr. [MVP]]

Yes, I can ping it, and in fact, DNS works great on it if i manually
set a client to use that DNS server. However, I have over 60 clients,
and I do not want to have to do that. I know it should be able to
pick up through DHCP, I just can't see whats missing in my set up.
Thanks.

Have you verified that you _are_ using option 006(DNS servers) and not
option 005(Name servers)?

 

[Guest]

Thanks again for replies. Yes, I am using option 006>DNS Servers in DHCP
Server options. Also, yes, the clients are all set to receive both IP and DNS
Servers automatically. As I said, if I change it to manual DNS and enter the
new DNS Server IP, it works great, just no luck getting automatically after
release and renew.

 

[Kevin D. Goodknecht Sr. [MVP]]

Thanks again for replies. Yes, I am using option 006>DNS Servers in
DHCP Server options. Also, yes, the clients are all set to receive
both IP and DNS Servers automatically. As I said, if I change it to
manual DNS and enter the new DNS Server IP, it works great, just no
luck getting automatically after release and renew.

It may be coming from a GPO then, check all GPOs here:
Computer Configuration
-Administrative Templates
-Network
-DNS Client
-DNS Servers

 

[Ace Fekay [MVP]]

Thanks again for replies. Yes, I am using option 006>DNS Servers in
DHCP Server options. Also, yes, the clients are all set to receive
both IP and DNS Servers automatically. As I said, if I change it to
manual DNS and enter the new DNS Server IP, it works great, just no
luck getting automatically after release and renew.

It's pretty basic to setup DHCP, and all the responses you're getting are
just double checking the settings for you. Just to add to the pot, I have a
few more questions/views.

Is the DHCP server able to assign IPs to other DHCP enabled devices, such as
a printer, etc? Is there another DHCP server on the network? Has the scope
been verified that it was created correctly, such as subnet mask? FYI, a
DHCP server will only give out a scope that matches the subnet the NIC's
sitting on.

Have you tried deleting the scope and starting over from scratch?

Can you run a netmon capture to see exactly what is transpiring?

--
Regards,
Ace

Please direct all replies ONLY to the Microsoft public newsgroups
so all can benefit.

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 Windows MVP - Windows Server - Directory Services

Paramount: What's up with taking Enterprise off the air??
Infinite Diversities in Infinite Combinations.
=================================

 

[Guest]

Yes, the DHCP server is functioning correctly in all respects. I have no
trouble getting IP addresses from it for clients or peripheral devices. There
is positively only one DHCP server on the network. The scope has been
correctly created and has been functioning in its current state for about a
year with no problems. I have not deleted the scope and started it fresh.
Since I have so many clients on it, I figured I would troubleshoot the
problem until I was out of options before reinstalling anything. Answering
questions to verify the basics are correct is never a problem for me, thanks
for your reply... Netmon is next I guess.

Scott

 

[Ace Fekay [MVP]]

Yes, the DHCP server is functioning correctly in all respects. I have
no trouble getting IP addresses from it for clients or peripheral
devices. There is positively only one DHCP server on the network. The
scope has been correctly created and has been functioning in its
current state for about a year with no problems. I have not deleted
the scope and started it fresh. Since I have so many clients on it, I
figured I would troubleshoot the problem until I was out of options
before reinstalling anything. Answering questions to verify the
basics are correct is never a problem for me, thanks for your
reply... Netmon is next I guess.

Scott

Scott,

Sorry for the late response. Ever get it working?

Ace

 

[Guest]

N, I havent had any spare time to spend on it. I need to run netmon and post
results. Thanks for checking back.

 

[Ace Fekay [MVP]]

N, I havent had any spare time to spend on it. I need to run netmon
and post results. Thanks for checking back.

No prob. I'll be monitoring this thread for your results.

Ace