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how to creat additional dhcp server in a singal forest domain
i have a single domain in my network & 300 clients, and i have one domain controller & one additional domain controller in DC i have DNS server & DHCP Server also, my question is that is that possible we can make other or additional DHCP server in my network so that in future whenever my dc server goes down then our users can get ips from my other dhcp server which is running in same forest.
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The best option for this on a single subnet is to split the DHCP scope down the middle
Set up the servers along the following lines
Server A Sever B
Scope 192.168.1.11 - 192.168.1.250 192.168.1.11 - 192.168.1.250
Exclusions 192.168.1.101 - 192.168.1.250 192.168.1.11 - 192.168.1.100
Reservations 192.168.1.1 - 192.168.1.10 192.168.1.1 - 192.168.1.10
If you do it like this either machine will be able to issue valid IPs as required without them producing duplicate IPs. By setting the same reservations on both machines you make sure that those machines that require a reserved IP always bet the same IP reservation no matter which server issues the IP
Set up the servers along the following lines
Server A Sever B
Scope 192.168.1.11 - 192.168.1.250 192.168.1.11 - 192.168.1.250
Exclusions 192.168.1.101 - 192.168.1.250 192.168.1.11 - 192.168.1.100
Reservations 192.168.1.1 - 192.168.1.10 192.168.1.1 - 192.168.1.10
If you do it like this either machine will be able to issue valid IPs as required without them producing duplicate IPs. By setting the same reservations on both machines you make sure that those machines that require a reserved IP always bet the same IP reservation no matter which server issues the IP
I agree with the solutions mentioned above where you split the DHCP scopes on different servers. Another approach would be to configure the standby DHCP server as an exact replica of the current DHCP server. But do NOT autghorize the DHCP server with the AD and it would not hand over the IPs. In case your primary DHCP fails a simple Authorization from the GUI would bring the backup server in play.
Windows Server 2003
Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).
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As Ruscal has said, DHCP is just one component out of many others which you will need to build redundancy into. DNS is one. You will also want to look at the file system - where are files stored and can you use DFS to replicate them to another server?
-tigermatt