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how to replace DHCP running on Smoothwall with DHCP on  Windows 2003 Server

Posted on 2007-11-19
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Last Modified: 2008-02-01
Please help,

we are looking to replace our DHCP server, currently running on Smoothwall to new windows 2003 srv.

can i do this during working hours?
will this cause downtime?
can i reconfigure the new DHCP while the old one is still working?
Any step by step instruction for the configuration?

thanks
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Question by:winperez
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6 Comments
 
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Expert Comment

by:Rob Williams
ID: 20314112
Assuming you are not changing the DHCP scope, you can create the new scope on the new server, shut down the old DHCP server, and then activate the new. There should be no loss of service. As the DHCP leases expire they will renew with the new server. Having said that a DHCP server should ping an IP to verify it is not in use before assigning it to a new device. There is the risk that that will not happen, and a duplicate IP could be handed out.

If you have a small enough existing scope such that you could assign another range in the same subnet, that would be a better option. For example if you are using 192.168.100.100 to 192.168.100.149 with a subnet mask of 255.255.255.0 you could make the new range 192.168.100.150 to 192.168.100.199 and keep the 255.255.255.0 mask. Make sure that doesn't conflict with any static IP's.
You could also reboot all PC's during the switch over. If you are not rebooting the PC's you might want to shorten the lease time on the existing Smoothwall DHCP server to something like 4 hours for a few days to shorten the renewal period.
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Author Comment

by:winperez
ID: 20315394
how do i stop dhcp on the smoothwall?
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LVL 77

Accepted Solution

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Rob Williams earned 1500 total points
ID: 20316589
Smoothwall, that would be a Linux product would it not <G>. Sorry no help. Hopefully someone will be along. If not, you could post a specific question about stopping the DHCP service in the Linux forum:
http://www.experts-exchange.com/Networking/Linux_Networking/
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LVL 77

Expert Comment

by:Rob Williams
ID: 20398299
Thanks winperez. I hope you were able to resolve.
Cheers !
--Rob
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Author Comment

by:winperez
ID: 20411918
we were able to go reconfigure the isa 2000 move all settings from smoothwall. now we are ready to install isa 2006 on the spare server.


thanks for your help.
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Expert Comment

by:Paniqueado
ID: 23497883
Hi, you can stop the DHCP service in the smoothwall in Services --> DHCP and remove the enable mark.
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