[CentOS] Question about dhcpd.leases

Thu Apr 8 19:34:57 UTC 2010
Les Mikesell <lesmikesell at gmail.com>

On 4/8/2010 9:59 AM, Niki Kovacs wrote:
> Hi,
>
> I'm running a DHCP server on my local network. I've noticed something
> that puzzles me. Leases are written to /var/lib/dhcpd/dhcpd.leases, but
> only - so it seems to me - if the address is not fixed in any way in
> dhcpd.conf.
>
> Here's a few stanzas of my dhcpd.conf :
>
> host babasse    {
>           hardware ethernet 00:0d:61:ae:6b:8f;
>           fixed-address 192.168.1.1;
>           option host-name "babasse";
> }
>
> host bernadette {
>     hardware ethernet 00:0d:61:a6:e7:1e;
>     fixed-address 192.168.1.2;
>     option host-name "bernadette";
> }
>
> host raymonde {
>     hardware ethernet 00:20:ed:b8:e8:ec;
>     fixed-address 192.168.1.3;
>     option host-name "raymonde";
> }
>
> host lifebook {
>           hardware ethernet 00:0b:5d:46:f2:10;
>           fixed-address 192.168.1.5;
>           option host-name "lifebook";
> }
>
> How comes these machines never appear in dhcpd.leases ? Do the
> respective leases only find their way into /var/log/messages ?

fixed-addresses are permanently reserved.  The leases file tracks the 
ones from the pool that are temporarily reserved until they expire.

-- 
    Les Mikesell
     lesmikesell at gmail.com