Try
ifconfig -a configinfo
$ ifconfig -a configinfo lo0 inet plumb mtu 8232 index 1 addif 127.0.0.1 netmask 0xff000000 up qfe1 inet plumb mtu 1500 index 6 addif 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255 up