[Dnsmasq-discuss] Unable to get a reserved address when dhcp-range not specified

[Donald Muller]

I recently added a 2.5GB switch to my network. All devices, which are NAS devices, plugged into the switch have a reservation for their IP4 address except of course the NAS running dnsmasq which has a fixed address. I updated dnsmasq to include the reservations and the following dhcp options.

dhcp-option=tag:eth4,option:netmask,255.255.255.0                                                                                                      # set net mask (1)
dhcp-option=tag:eth4,option:router,0.0.0.0                                                                                                                                         # set router address (3)

No address range is specified for eth4. When one of the NAS devices attempts to get an IP address I receive the following error message.

no address range available for DHCP request via eth4

Even though I have reservations for the devices they never receive their reserved address. If I add the range option then the devices receive their reserved address.

dhcp-range=tag:eth4,192.168.122.100,192.168.122.199,255.255.255.0,3d

Why do I need to specify a dhcp range when the devices have reservations? I don't want a device that does not have a reservation on this subnet to be able to plug into the switch and get an address. Is this a bug in dnsmasq? If not is there a way to accomplish what I am trying to do?

I am running dnsmasq version 2.88.
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