Fast Solution to Error: Computers on the LAN do not get the gateway and the DNS servers from DHCP server.

Computers on the LAN do not get the gateway and the DNS servers from DHCP server.

Hello all,

For a few days now I've been trying to troubleshoot the problem.
Here are the details and what I tried so far:

This is a small network with Windows 2008 R2 domain controller, running DHCP server and Cisco router RV082 (disabled DHCP) and  WiFi access point not running DHCP nor router. I have also another DC/Exchange server with a static address *not running* DHCP server.
The client machines are: my desktop on wired connection running W7, network printer, my personal laptop running W7 (usually WiFi) and my work notebook W7/WiFi.
I should mention also my phone Windows Mobile 6.x/Wifi.

Until several days ago all clients were getting IP addresses, gateway addresses, DNS addresses just fine and then all of a sudden none working: all with the problem that they get valid IP address but no gateway and DNS from the server.
Only if I set the gateway
and the DNS server in the advanced options of the IPv4 properties manually the clients are able to connect to internet, etc.
I just cannot think of what have changed in the last dyas.
Except for the regular OS updates from MS.
 
I tried all sorts of things from the internet forums with no success.
(And it seems like this is a pretty popular problem.) The last thing I tried on the desktop PC was:
netsh winsock reset catalog
netsh int ipv4 reset reset.log
netsh int ipv6 reset reset.log

and shutting down and then bringing up the modem, router, DC and the desktop in this order.

Please help me as this manual configuration is killing me.
Especially the laptops when I take them out.

Looking forward to your suggestions.

Thank you
Val

Anwsers to the Problem Computers on the LAN do not get the gateway and the DNS servers from DHCP server.

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OK, for anyone who feels that this might be her problem here is how I fixed it: in the DHCP server open IPv4 properties->Network Access Protection->Disable on all scopes.
I am not familiar with this feature and hope that someone more knowledgable than me can
explain what was going on and what is the *right* way to fix the problem.

Looking forward to your comments.
Val

This particular error can easily be resolved with a few simple steps. However, if you are not confident in your ability to use the methods below or they do not fully remove the issue on your computer, you may want to seek the assistance of a qualified repair technician who is well versed in fixing Computers on the LAN do not get the gateway and the DNS servers from DHCP server..

1. Back-up the Registry of your operating system.
2. Find the Registry Key: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\OSUpgrade]
3. Note: this Registry Key should already exist, if it does not exist, create it.
4. Create a brand new DWORD Value that is named AllowOsUpdate
5. Set the Value to 0x00000001.
6. Close and reopen your Control Panel.
7. Restart the Microsoft Windows.

Another Safe way to Fix the Problem: Computers on the LAN do not get the gateway and the DNS servers from DHCP server.:

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