On 7/15/2011 1:54 PM, Timothy Murphy wrote: > Ljubomir Ljubojevic wrote: > >> as a rule, you should declare ALL subnets in simple form: >> >> subnet 192.168.2.0 netmask 255.255.255.0 { } >> >> so ISC DHCP knows about them. Why, I do not know, but it is supposed to >> be in newer versions (more strict rules for config file.) > > Thanks for your response. > As far as I can see, my dhcpd.conf satisfies these conditions. > > But what puzzles me is, what defines the correspondence > between interface and network, > eg in my case eth1 -> 192.168.2.0/24 > > Surely this should be there independently of dhcpd ? Dhcpd shouldn't care about the name of the interface, but if the request hasn't been forwarded by a router/relay agent it needs to figure out the subnet of the interface where the request is received so it uses the corresponding range and options for the response. -- Les Mikesell lesmikesell at gmail.com