Ok... Got a VM... Here is lease it just got
192.168.2.216 02:11:32:25:fa:2d clean 2018/08/06 18:15:23 2018/08/08 18:15:23
That is out of the normal pool...So going to deny its 02:11:32, and put that into a different pool for allow.. Then do a reboot of that vm..
0_1533580531752_pools.png
So on reboot client got
192.168.2.40 02:11:32:25:fa:2d clean 2018/08/06 18:34:48 2018/08/08 18:34:48
And in log.
Aug 6 13:34:48 dhcpd DHCPACK on 192.168.2.40 to 02:11:32:25:fa:2d (clean) via igb2
Aug 6 13:34:48 dhcpd DHCPREQUEST for 192.168.2.40 (192.168.2.253) from 02:11:32:25:fa:2d (clean) via igb2
Aug 6 13:34:48 dhcpd DHCPOFFER on 192.168.2.40 to 02:11:32:25:fa:2d (clean) via igb2
Aug 6 13:34:47 dhcpd DHCPDISCOVER from 02:11:32:25:fa:2d via igb2
Aug 6 13:34:35 dhcpd DHCPRELEASE of 192.168.2.216 from 02:11:32:25:fa:2d (clean) via igb2 (found)
Worked exactly how it should..
edit
Ok so I now removed that extra pool... And rebooted that vm again... An now its getting told to F no free leases for you ;)
Aug 6 13:45:32 dhcpd DHCPDISCOVER from 02:11:32:25:fa:2d via igb2: network 192.168.2.0/24: no free leases
Aug 6 13:45:24 dhcpd DHCPDISCOVER from 02:11:32:25:fa:2d via igb2: network 192.168.2.0/24: no free leases
Aug 6 13:45:21 dhcpd DHCPDISCOVER from 02:11:32:25:fa:2d via igb2: network 192.168.2.0/24: no free leases
Aug 6 13:45:17 dhcpd DHCPDISCOVER from 02:11:32:25:fa:2d via igb2: network 192.168.2.0/24: no free leases
Aug 6 13:45:14 dhcpd DHCPDISCOVER from 02:11:32:25:fa:2d via igb2: network 192.168.2.0/24: no free leases
So my take would be your other pool you created is not correct, or don't have the allow setup correct on it? Or it didn't get started? etc..
So I removed the block mac listing on the normal pool and bam client got its IP..
Aug 6 13:48:47 dhcpd DHCPACK on 192.168.2.216 to 02:11:32:25:fa:2d (clean) via igb2
Aug 6 13:48:47 dhcpd DHCPREQUEST for 192.168.2.216 (192.168.2.253) from 02:11:32:25:fa:2d (clean) via igb2
Aug 6 13:48:47 dhcpd DHCPOFFER on 192.168.2.216 to 02:11:32:25:fa:2d (clean) via igb2
Aug 6 13:48:46 dhcpd DHCPDISCOVER from 02:11:32:25:fa:2d via igb2
Aug 6 13:48:46 dhcpd Server starting service.