ISC dhcp assigns ip addresses outside dynamic range

Chuck Anderson cra at WPI.EDU
Wed Jul 4 15:28:32 UTC 2018


On Wed, Jul 04, 2018 at 03:54:15PM +0200, Frank Ulherr wrote:
> Hallo,
> 
> > Hi,
> > 
> > On Wed, 4 Jul 2018, Frank Ulherr wrote:
> > > our dhcpd.conf contains the following section:
> > >
> > > subnet 10.91.120.0 netmask 255.255.255.0 {
> > > option routers 10.91.120.254;
> > > option domain-name-servers 8.8.8.8;
> > > pool {
> > > failover peer "dhcp-failover";
> > > deny dynamic bootp clients;
> > > range 10.91.120.94 10.91.120.94;
> > > range 10.91.120.106 10.91.120.106;
> > > range 10.91.120.108 10.91.120.108;
> > > range 10.91.120.111 10.91.120.111;
> > > range 10.91.120.113 10.91.120.114;
> > > ...
> > >
> > > Unfortunately the ip address 10.91.120.7 is assigned to a client.
> > 
> > most propably you have a host reservation for 10.91.120.7 either in your configuration file or in the lease file.
> 
> There is a reservation for that ip address:
> 
> host a.lraroth.de-005056b22f2c {
>         hardware ethernet 00:50:56:b2:2f:2c;
>         fixed-address 10.91.120.7;
>         option host-name "a";
> }
> 
> But the ip address is assigned to a different mac address.

Maybe the VM was cloned from an image that has the same MAC or client-id stored.


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