DHCP "static" assignments

[Gregory Sloop]

CB> On Aug 7, 2013, at 1:39 PM, Gregory Sloop <gregs at sloop.net> wrote:

>> Here's the effect I want...
>> 
>> I want the DHCP server to hand out specific IP's to specific MAC
>> addresses, [as defined in the host record.]
>> 
>> They're static DHCP assignments, not static IP clients.
>> ---
>> i.e. I want 10.0.0.10 to get assigned *via the DHCP server* to the
>> host with MAC Address aa:bb:cc:dd:ee:ff
>> 
>> Also, I'm assigning via DHCP addresses from 10.0.0.1-10.0.0.20 to
>> anyone who asks via DHCP.
>> 
>> The way I do it now, is assign pools as follows
>> 
>> 10.0.0.1-10.0.0.9 && set "allow unknown-hosts"
>> 10.0.0.10 && set "deny unknown-hosts"
>> 10.0.0.11-10.0.0.20 && set "allow unknown-hosts"
>> 
>> AND create a host entry for 10.0.0.10 like so:
>> 
>> host somehost {
>>        hardware ethernet aa:bb:cc:dd:ee:ff;
>>        fixed-address 10.0.0.10;
>>        }
>> 
>> ---
>> 
>> I *think* I have to include the relevant IP in a pool. (In this case
>> 10.0.0.10)  [If there's no pool with 10.0.0.10 in it, the DHCP server
>> won't hand out an IP for 10.0.0.10, no matter what host record there
>> is, will it?]

CB> Yes it will. You do not need a pool surrounding your reserved address.

CB> Something like this should work:

CB> host somehost {
CB>         hardware ethernet aa:bb:cc:dd:ee:ff;
CB>         fixed-address 10.0.0.10;
CB> }

CB> subnet 10.0.0.0 netmask 255.255.255.0 {
CB>         <options>
CB>         pool {
CB>                 range 10.0.0.1 10.0.0.9;
CB>                 range 10.0.0.11 10.0.0.20;
CB>         }
CB> }

Wow, I guess I really *was* holding it wrong, eh!? :)
Thanks all for the help!

[I still wish I could just define the whole pool as 1-20 and then the
host def would reserve it, but I'll live, I suppose. :) ]

-Greg