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Old 07-11-2007, 08:43 AM   #1
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Question DHCP address exclusion

I have an existing network with 256 addresses which has had it's range expanded to 512.
Originally the first 200 were static and the remainder are dynamic but some are being used as stickies (i.e. relying on the leases gettign renewed at the same address).
What I really need is two groups of static addresses so the old dynamics can be left alone and a new set at the top of the new range - is this possible with exclusions or with multiple subnets that would be able to see each other?
Old 07-12-2007, 07:24 AM   #2
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Here is a link to the DHCP HOWTO:

Here is an excerpt:
You can also mix and match e.g. you can have certain clients getting "static" IP addresses (e.g. servers) and others being alloted dynamic IPs (e.g. mobile users with laptops). There are a number of other options e.g. nis server addresses, time server addresses etc., if you need any of those options please read the dhcpd.conf man page.
Old 07-12-2007, 07:40 AM   #3
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You'd need two address pools, one scoped the original 256 and another for the new 256. Then just setup reservations (stickies) in the first pool like before. If you use different subnets things get a lot trickier -- you'd need separate DHCP servers in each subnet or a DHCP relay.


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