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DHCP Problems with Windows 2003

Last response: in Networking
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April 7, 2010 6:07:41 PM

Probably very simple, but i cant figure out what ive done wrong. My setup is as follows:
Modem -> Cisco 800 -> W2k3 Server -> Netgear Switch -> PC Users

I'm setting up a domain with AD.
Currently im setup as follows:

NIC1 :
IP Address:10.20.20.100
SubNet Mask:255.255.255.0
Default Gateway:10.20.20.3

Preferred DNS:10.20.20.100
Secondary DNS:

NIC2:
IP Address:173.220.97.149
SubNet Mask:255.255.255.248
Default Gateway:173.220.97.145

Preferred DNS:167.206.112.138
Secondary DNS:167.206.7.4

On the Netgear Switch, the DHCP is off and the info is as follows:
IP Address: 10.20.20.3
SubNet Mask: 255.255.255.0
Default Gateway: 10.20.20.100

And Finally, in the DHCP scope options, it looks as follows:
dc.core.local [10.20.20.100]
Scope[10.20.20.0]
Router: 173.220.97.145
DNS Server: 167.206.112.138; 167.206.7.4
Domain Name: core.local


So as it stands, the server can access the internet, but no pc gets DHCP and cant access anything. Where did i go wrong? Thanks.

Dave
April 10, 2010 2:11:36 AM

A few questions.

1. I presume that NIC1 is on your LAN. Is this correct?

2. What device is 10.20.20.3? That one is confusing.

3. What is the default gateway for your DHCP clients? Is it 10.20.20.100?

4. If 10.20.20.100 is a DNS, why is it different for your clients? Your DNS server should normally forward to 167.206.112.138 and 167.206.7.4 (unless you don't want clients to access the server's DNS).

5. The DHCP router can't be 173.220.97.145 unless your clients are connected to that interface. Since they're not, the default gateway should be 10.20.20.100 (I still need to understand what 10.20.20.3 is).
April 18, 2010 12:55:32 AM

Thanks for the reply but i have figuered it out. I just needed a gateway router, and default gateway as 10.20.20.4 and voila it worked.
!