I had been running a dhcp server on an old version of isc dhcpd circa 2005, 3.0 something. I just upgraded to ISC dhcpd version isc-dhcpd-4.1-ESV-R6.
Before upgrading, the interface (eth0) had two address assigned to it, 172.16.0.1 on eth0:0 and 192.168.0.1 one eth0:1. But the actual interface eth0 had no address assigned. Only the subnet 192.168.0.0/24 was handing out address, and this worked fine. Now, after upgrading, it gives me the error:
No subnet declaration for eth0 (no IPv4 addresses).
Which is true, there is only subnets defined for eth0:0 and eth0:1. I tried playing around with my config file, adding a shared-network statement, but nothing worked. Finally, I just assigned an address to the physical interface eth0 and it started happily.
I just want to know if its possible to get the old behavior as I have code that depends on it. Or do I have to assign a dummy address on eth0? The dhcp config looks like this:
ddns-update-style interim;
ignore client-updates;
subnet 172.16.0.0 netmask 255.255.255.0 {
}
subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.2 192.168.0.4;
option ip-forwarding off;
option domain-name-servers 192.168.0.1;
option broadcast-address 192.168.1.255;
option subnet-mask 255.255.255.0;
option routers 192.168.0.1;
default-lease-time 30;
max-lease-time 60;
}
