filer*> ifconfig e1b alias 192.168.101.4
Will add the address 192.168.101.4 to my NIC e1b, which already contained the IP 192.168.100.4
filer*> ifconfig e1b e1b: flags=0x3d48867mtu 9000 inet 192.168.100.4 netmask 0xffffff00 broadcast 192.168.100.255 inet 192.168.101.4 netmask 0xffffff00 broadcast 192.168.101.255 ether 00:07:43:05:7c:db (auto-10g_sr-fd-up) flowcontrol full