I had to get my hands dirty recently to migrate some Solaris boxes. While I’m not totally unfamiliar with Solaris zones, the commands slipped my mind since I don’t use it on a day to day basis.
zonecfg -z zonename
select net address=x.x.x.x (where x.x.x.x is the current address)
set address=y.y.y.y (where y.y.y.y is the new address)
That’s it. Another quick reference and addition to my own F(**king)M(anual).