DHCP Scopes on servers
Here is the situation:
I have 2 2003 server DCs and I just added 3 2008 DC Servers in my domain (same site). On the 2 2003 servers I have 1 scope on each DC split like this
2003 DC1 - 192.168.10.20 to 192.168.10.127
2003 DC2 - 192.168.10.128 to 192.168.10.254
I exported and then imported the dhcp scope settings from the 2 2003 servers to 2 of the 2008 servers and everything is running fine - so it's like a mirror now so to speak. On the 3rd 2008 server I need to make a scope of these IPs, so I need to split it up something like:
2008 DC3 - 192.168.10.20 to 192.168.10.50
2008 DC4 - 192.168.10.51 to 192.168.10.200
2008 DC5 - 192.168.10.210 to 192.168.10.254
Questions:
While I change the scope settings on the 2008 DCs (splitting them up like above) will this cause any problems with clients who already have leases?
Once I am done creating the scopes on the 2008 servers as above can I then stop the DHCP services on the 2003 servers safely without having issues? If a client(s) is now having a lease from one of the 2003 servers and I stop the DHCP services on the 2003 server I'm assuming they will be fine since it will automatically be picked up by the scopes on the 2008 DCs, correct?
I hope running the same scopes on the servers ( for the time being) wont cause problems.
I plan on demoting the 2003 DCs as soon as I straighten out the DHCP on the 2008 servers. Thanks.
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You should have de-authorized the 2003 servers BEFORE bringing up the 2008 servers. Please de-authorized them immediately. If your clients have problems after that, go to start>>RUN>> and type services.msc. Then, restart the DHCP server service on both 2008 servers.
ASKER
Ok, I just unauthorized both 2003 servers and then I restarted the dhcp server on them a few minutes ago - so far no problems. Both 2003 dhcp servers now have the red arrow icon point downwards - signifying they are not authorized. However they are still started since when I go to all All Tasks I have the option to either Stop, Pause or Restart.
When the client leases expires they should now pick up from the 2008 dhcp servers....hopefully.
Thanks!
When the client leases expires they should now pick up from the 2008 dhcp servers....hopefully.
Thanks!
ASKER
ever since I unauthorized the two 2003 dhcp servers I have 2 users who cant get an ip address from the new 2008 servers, everyone else at this monent seems fine. I tried ipconfig -release, I restarted their machines, I also restarted the two 2008 DCs (dhcp server services) as well.
any help?
any help?
Well, DHCP is working well. Check their nic settings to ensure that IPv6 is not enabled. It doesn't appear that you support that on your network. Once you disable IPv6 and enable TCP/IP v4 then try to go to the command prompt and type:
Ipconfig /release
IPconfig /renew
Also, some software firewalls block DHCP, unless otherwise told not to by a rule. So, you might check into any software firewalls. These two users also are on the same broadcast domain, correct??
Ipconfig /release
IPconfig /renew
Also, some software firewalls block DHCP, unless otherwise told not to by a rule. So, you might check into any software firewalls. These two users also are on the same broadcast domain, correct??
if all else fails:
Go to START>>RUN>>services.msc
And reset the DHCP client service applet.
Go to START>>RUN>>services.msc
And reset the DHCP client service applet.
ASKER
The two 2008 dhcp servers are online and authorized and dns is all setup accordingly.
Thanks.