Additional DHCP server

sapan219 · 12-28-2008, 09:22 PM

Dear All,

I have a query on that can we configue addional DHCP or not? If yes than how to possble to configure additonal DHCP server in Windows Server 2003?

Please help me

Thnaks in advance

Sapan

rthomp8363 · 12-29-2008, 09:01 AM

The problem of having two different DHCP servers is that you dont know which one will answer. It is a broadcast message sent out and one of the two, or both will respond to the address, unless they are on totally diffent networks.

jonno112 · 12-30-2008, 02:06 AM

You could be looking at a dhcp cluster have a look at this link
http://technet.microsoft.com/en-us/l.../cc778572.aspx

When one fails the other takes over.

bdesmondMVP · 01-03-2009, 07:34 PM

Typically the way this is done is with the 80/20 rule. You would configure the DHCP scope on two servers, with 80% of the address space on Server A and 20% of the address space on Server B.

**bilbus** · 01-06-2009, 10:25 AM

We use two DHCP server with no problems. Brian is correct .. as long as they have two seperate scopes your fine.

Like Server1 10.1.1.x and Server2 10.1.2.x

I perfer to have two equal size scopse .. as i dont really care what server is handling requests .... and i can tell what server the client got his ip from by the ip address that was asigned.

Chevy · 01-08-2009, 03:50 AM

you can run 2 DHCP servers with the exact same settings with one difference:

Server A (Primary) has a lease longer than Server B (Backup/Secondary).

Clients will accept the lease from A because it is a "better deal". If A goes down, then clients will accept leases from B. When A is restored, you can force a release of all leases on B to get clients back on A.

**bilbus** · 01-08-2009, 04:44 AM

Ah, i did not know longer leases made it more preferable to the clients.

Good fact to know, thanks

Chevy · 01-08-2009, 06:47 AM

Forgot to mention ... Windows 98 clients sometimes don't play well, but NT4 and above will take the longer lease.

12-28-2008, 09:22 PM	#1 (permalink)
sapan219 Registered User Join Date: Dec 2008 Posts: 7 OS: Windows Server 2003,Windows XP	Additional DHCP server Dear All, I have a query on that can we configue addional DHCP or not? If yes than how to possble to configure additonal DHCP server in Windows Server 2003? Please help me Thnaks in advance Sapan

12-29-2008, 09:01 AM	#2 (permalink)
rthomp8363 Registered User Join Date: Aug 2008 Posts: 69 OS: XP	Re: Additional DHCP server The problem of having two different DHCP servers is that you dont know which one will answer. It is a broadcast message sent out and one of the two, or both will respond to the address, unless they are on totally diffent networks.

12-30-2008, 02:06 AM	#3 (permalink)
jonno112 Registered User Join Date: Nov 2003 Location: melbourne Posts: 246 OS: XP, 2k3server, Vista	Re: Additional DHCP server You could be looking at a dhcp cluster have a look at this link http://technet.microsoft.com/en-us/l.../cc778572.aspx When one fails the other takes over.

01-03-2009, 07:34 PM	#4 (permalink)
bdesmondMVP Registered User Join Date: May 2008 Location: Chicago Posts: 123 OS: 2003SP2x86	Re: Additional DHCP server Typically the way this is done is with the 80/20 rule. You would configure the DHCP scope on two servers, with 80% of the address space on Server A and 20% of the address space on Server B. __________________ Thanks, Brian Desmond Windows Server MVP

01-06-2009, 10:25 AM	#5 (permalink)
bilbus TSF Enthusiast Join Date: Aug 2006 Posts: 956 OS: OS2 Warp	Re: Additional DHCP server We use two DHCP server with no problems. Brian is correct .. as long as they have two seperate scopes your fine. Like Server1 10.1.1.x and Server2 10.1.2.x I perfer to have two equal size scopse .. as i dont really care what server is handling requests .... and i can tell what server the client got his ip from by the ip address that was asigned.

01-08-2009, 03:50 AM	#6 (permalink)
Chevy Retired Join Date: Jul 2003 Location: Notlob Posts: 5,452 OS: Vista Ultimate My System	Re: Additional DHCP server you can run 2 DHCP servers with the exact same settings with one difference: Server A (Primary) has a lease longer than Server B (Backup/Secondary). Clients will accept the lease from A because it is a "better deal". If A goes down, then clients will accept leases from B. When A is restored, you can force a release of all leases on B to get clients back on A.

01-08-2009, 04:44 AM	#7 (permalink)
bilbus TSF Enthusiast Join Date: Aug 2006 Posts: 956 OS: OS2 Warp	Re: Additional DHCP server Ah, i did not know longer leases made it more preferable to the clients. Good fact to know, thanks

01-08-2009, 06:47 AM	#8 (permalink)
Chevy Retired Join Date: Jul 2003 Location: Notlob Posts: 5,452 OS: Vista Ultimate My System	Re: Additional DHCP server Forgot to mention ... Windows 98 clients sometimes don't play well, but NT4 and above will take the longer lease.