moving subnet to another server

Patrick Trapp ptrapp at
Fri Jan 9 18:59:24 UTC 2015

How are you planning to prevent the new server from handing out addresses already assigned by the old server?

From: dhcp-users-bounces at [dhcp-users-bounces at] on behalf of Dana Huggard [dana.huggard at]
Sent: Friday, January 09, 2015 12:33 PM
To: dhcp-users at
Subject: moving subnet to another server


I'm planning on moving a subnet over to another server and am not sure what kind of devil hides in the details.

The subnet is 10.x.x.0/18 and it is very busy. Its a subnet devoted to a test harness of servers that go up and down a lot putting a big load on dhcpd and named (using ddns).

Along with the dhcpd change the new dhcp server will also serve as a dns server for a new domain.

To implement the move I have a new dhcp server I plan to remove the subnet declaration from dhcpd.conf off the old server, add it to the new server, then restart dhcpd on the old server, and start dhcpd on the new server.

What I am wondering about is what to expect for the behaviour of the dhcp clients. How disruptive might this be?

Thank you.

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