Adding a second DHCP

  • Thread starter Thread starter Tracey
  • Start date Start date
T

Tracey

I have only one DHCP server that supplys 2 subnets, how do I add DHCP to
another server with the same information so I have a backup DHCP server in
case something happens to the other one.
 
You don't want to have two live DHCP servers with the same
settings/range....you'll get conflicts. You could set up another and not
activate it.
 
You need to setup a "superscope" on each server. Under this you
create the same scope on both servers, but exclude the range of ip
addresses used by the other server.

E.G

Server 1
Superscope
Scope1 - range 10.1.1.1 - 10.1.1.254
Exclusions 10.1.1.151-10.1.1.254

Server 2
Superscope
Scope1 - range 10.1.1.1 - 10.1.1.254
Exlusions 10.1.1.1 - 10.1.1.150


This setup will avoid the situation where clients keep getting NAks as
the each server will ignore DHCP renewal requests for ips in in the
exclusion range under the superscope

There are some indepth articles on the knowledgebase but I can't seem
to find them at the moment. It took me a while the first time when I
wanted to do it as well.

Clive
 
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