vi /etc/config/netif.options
Change from this:
: if2addr=gate-$HOSTNAME
if3addr=gate2-$HOSTNAME
if4addr=gate3-$HOSTNAME
to this:
if2addr=fddi-$HOSTNAME
if3addr=gate-goofy
if4addr=192.30.28.26
Caution: Note that all default variables (primary and secondary) start with a leading colon (:). You must remove it and enter the interface address to change the default interface address.