[Dnsmasq-discuss] dhcp-host ignored

[Nicolas Cavallari]

Le 14/08/2026 à 07:52, Fabiano Sidler a écrit :
> Hi folks!
> 
> I'm running on Debian 13 with default configuration plus the following 
> files
> created in /etc/dnsmasq.d:
> 
> ,---[ dhcp-range ]
> |
> |  dhcp-range=192.168.100.200,192.168.100.254
> |
> `-----------------
> 
> ,---[myhost.example.org]
> |
> |  dhcp-host=52:54:00:ff:bc:ed,myhost.example.org,192.168.100.10
> |
> `-----------------------
> 
> This should assign myhost the IP 192.168.100.10 over DHCP. But instead, an
> address from the dhcp-range is assigned and in /var/lib/misc/dnsmasq.leases
> the following entry is created:
> 
>      1786687876 52:54:00:ff:bc:ed 192.168.100.223 myhost 
> ff:00:ff:bc:ed:00:01:00:01:32:11:39:09:52:54:00:e0:6f:4c
> 
> So the MAC address "seen" by Dnsmasq is the correct one.


The client sent a client identifier, so dnsmasq probably identifies that 
machine with it instead of the MAC address, as recommended in RFC 2131 
and later RFCs.

I would try:
dhcp-host=52:54:00:ff:bc:ed,id:*,myhost.example.org,192.168.100.10