On RedHatEnterprise 8.3, my root cause was firewalld.Įven though firewalld had dhcp service enabled and was managing both interfaces, dhcpd issue went away when firewalld was stopped.

So, this almost certainly is not a case of a misplaced brace. service dhcpd configtest says Syntax: OK.So, I have a gateway, but service dhcpd start fails with the same error. Oh, hey! No gateway there! That's easy to fix with a GATEWAY=192.168.0.1 in the ifcfg-eth0 and ifcfg-p4p1 files. I switched my internal network IP addresses to 192.168.100.0/24 with matching changes to /etc/nf for no change in behavior. Prior to tonight's experiments: ~]# ip addr show dev eth0ģ: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000 You want, please write a subnet declaration

So, why am I still getting the 'No subnet declaration' error message at launch? No subnet declaration for eth0 (10.0.0.1). If it matters, my external interface is not physically connected and iptables is off/still being written. I also have an interface, p4p1, acting as my external interface. Eth0, my internal interface, has a static address of 10.0.0.1.

Linux get mac address p4p1