OPNsense Forum

English Forums => 26.1, 26,4 Series => Topic started by: biggreydog on May 08, 2026, 07:43:03 PM

Title: Host/Reservation questions with migration from ISC DHCP to DNSmasq DHCP
Post by: biggreydog on May 08, 2026, 07:43:03 PM
I migrated from ISC DHCP to DNSmasq and am keeping the same DHCP reservation range 10.0.1.100-10.0.1.255 after the switch on my 10.0.1.0/255 network.  All device IPs below 100 were manually set on my network but when I go to the hosts menu in DNSmasq, none of these IP addresses are listed.  What is the easiest way to get them over here. 
Title: Re: Host/Reservation questions with migration from ISC DHCP to DNSmasq DHCP
Post by: nero355 on May 09, 2026, 01:12:13 PM
Two things you need to keep in mind :

- The reservations used in DNSMasqd need to be INSIDE your DHCP Range !!
ISC and KEA like those to be OUTSIDE your DHCP range.

- You can Import all Static DHCP Mappings based on the MAC Address into ISC/KEA/DNSmasqd after Exporting them from DNSmasqd/ISC/KEA into a .CSV file :)
The OPNsense Developers made sure all three use the same format in the .CSV file so there is no difference between all three of them.