2 DHCP Server in one domain

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Yes, it is; but they must each serve addresses in a non-overlapping manner.
Perhaps a better questions is, why would you want two DHCP servers in a
domain?

--
Richard G. Harper [MVP Shell/User] (e-mail address removed)
* PLEASE post all messages and replies in the newsgroups
* for the benefit of all. Private mail is usually not replied to.
* My website, such as it is ... http://rgharper.mvps.org/
* HELP us help YOU ... http://www.dts-l.org/goodpost.htm
 
Yes you can. First, search MS for DHCPEXIM and download it. DHCPEXIM
allows you to clone a DHCP server, right down to the current leases.

On your first DHCP server, run DHCPEXIM to extract the database to a file.
This file will be binary. Now install the DHCP server on your second server
and disable it. Run DHCPEXIM to import the file from the first server.

Now for the critical step. You cannot have both DHCP servers allocating the
same dynamic range of IP addresses. To prevent this, split the dynamic
allocation into half and manually exclude one half of your range from one
server and the other half from the other server. Now start the second
server and ensure both servers are "Authorized" in the domain by using the
DHCP MMC snapin.

When adding a reservation, you need to add the same reservation to both
servers as you cannot control which server responds to a DHCP Client's
discovery request.

As for why to do this - REDUNDANCY!

Mike Ober.


Richard G. Harper said:
Yes, it is; but they must each serve addresses in a non-overlapping manner.
Perhaps a better questions is, why would you want two DHCP servers in a
domain?

--
Richard G. Harper [MVP Shell/User] (e-mail address removed)
* PLEASE post all messages and replies in the newsgroups
* for the benefit of all. Private mail is usually not replied to.
* My website, such as it is ... http://rgharper.mvps.org/
* HELP us help YOU ... http://www.dts-l.org/goodpost.htm


Gan said:
Hi there,

Is it possible that 2 DHCP server can co-exist in a domain?
Click to expand...
Click to expand...
 
That's exactly what I do here. It has worked flawlessly.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

Michael D. Ober said:
Yes you can. First, search MS for DHCPEXIM and download it. DHCPEXIM
allows you to clone a DHCP server, right down to the current leases.

On your first DHCP server, run DHCPEXIM to extract the database to a file.
This file will be binary. Now install the DHCP server on your second server
and disable it. Run DHCPEXIM to import the file from the first server.

Now for the critical step. You cannot have both DHCP servers allocating the
same dynamic range of IP addresses. To prevent this, split the dynamic
allocation into half and manually exclude one half of your range from one
server and the other half from the other server. Now start the second
server and ensure both servers are "Authorized" in the domain by using the
DHCP MMC snapin.

When adding a reservation, you need to add the same reservation to both
servers as you cannot control which server responds to a DHCP Client's
discovery request.

As for why to do this - REDUNDANCY!

Mike Ober.


Richard G. Harper said:
Yes, it is; but they must each serve addresses in a non-overlapping manner.
Perhaps a better questions is, why would you want two DHCP servers in a
domain?

--
Richard G. Harper [MVP Shell/User] (e-mail address removed)
* PLEASE post all messages and replies in the newsgroups
* for the benefit of all. Private mail is usually not replied to.
* My website, such as it is ... http://rgharper.mvps.org/
* HELP us help YOU ... http://www.dts-l.org/goodpost.htm


Gan said:
Hi there,

Is it possible that 2 DHCP server can co-exist in a domain?
Click to expand...
Click to expand...
Click to expand...
 
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