Run pkg update with the --accept option to update a small set of system packages:
#
pkg update --accept
#
reboot
Update the IPS package:
#
pkg update pkg:/package/pkg
Update the rest of the system packages:
#
pkg update --be-name s11.1ga --accept
#
reboot
#
uname -a
SunOS myhost 5.11 11.1 i86pc i386 i86pc Solaris