In the global zone:
dladm create-vnic -l net0 vnic1
dladm show-vnic
root@solaris01:~# zonecfg -z zone2
zonecfg:zone2> set ip-type=exclusive
zonecfg:zone2> add net
zonecfg:zone2:net> set physical=vnic1
zonecfg:zone2:net> end
zonecfg:zone2> verify
zonecfg:zone2> commit
zonecfg:zone2> exit
# zlogin zone2
zone2# ipadm create-ip vnic1
zone2# ipadm create-addr -T dhcp vnic1/dhcp