Am i going crazy?
Im trying to setup an dhcp, which was working so far for my net
192.168.88.0/255.255.255.0
now im enlarging the network so I changed the netmask to 255.255.240.0 and it stop working

I dnsmasq does dns, but it should also do dhcp, but doesnt, so I got dhcpd3, and i got this in syslog

this should work or?

I don't have a binary calculator at hand now so I have to guess.

You defined a network 192.168.88.0 with mask 255.255.240.0. Now the '88' MUST be on a network boundary for the '240' mask. In other words, if the last 4 bits of '240' are zero, the last 4 bits of you network definition have to be as well. I am not sure that '88' ends with 4 zeros, but I don't think so. Choose the next lower address which complies with the 4 zeroes, which is 80 I think. '88' will be included, so no problem for your expansion.

The definition of your new net should be 192.168.80.0 255.255.240.0 and you have a range from 192.168.80.1 to 192.168.95.254.

jlinkels

thanks a lot, that was it exactly it