fixed-address problem

Patrick Trapp ptrapp at
Tue Jan 26 21:24:20 UTC 2016

I don't see a problem with the subnet. OP just isn't using the entire pool, right?

I'm not sure what the effect of the "group" declaration is. I believe on my configurations where I'm assigning a static address, I'm just using a "host" declaration. I don't declare these hosts within the subnet declaration, either. I would be inclined to try the host declaration outside the subnet first.

From: dhcp-users-bounces at [dhcp-users-bounces at] on behalf of Sherman Lilly [Sherman.Lilly at]
Sent: Tuesday, January 26, 2016 1:35 PM
To: Users of ISC DHCP
Subject: RE: fixed-address problem

Your subnet is wrong

Sherman Lilly
(865) 215-3536
Senior Systems Administrator
Knox County
From: dhcp-users-bounces at [dhcp-users-bounces at] on behalf of Bernard Fay [bernard.fay at]
Sent: Tuesday, January 26, 2016 2:30 PM
To: dhcp-users at
Subject: fixed-address problem

Hello everyonw,

I am unable to assign fixed IP addresses to host.

I have the following configuration:

option domain-name "<>";
option domain-name-servers<>;

default-lease-time 300;
max-lease-time 1500;

subnet netmask {

#  range;
    option broadcast-address;
    option routers;
    option domain-name "<>";

  group {
    host vault {
      option host-name "<>";
      hardware ethernet 52:af:12:cf:87:c5;

With "range;"  the host is assigned the first available IP address. If I disable "range" like in the shown configuration, the log says: "dhcpd: DHCPDISCOVER from 52:af:12:cf:87:c5 via eth1: network<>: no free leases".

This ISC DHCP 4.2.5.

What am I doing wrong?


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