The nodename is getting managed through SMF in Solaris 11. There is now one central place to manage the nodename.
The change of the nodename requires an update in a SMF service property and a restart of the service:
svccfg –s svc:/system/identity:node setprop config/nodename = “NewHostname”
svcadm refresh svc:/system/identity:node
svcadm restart svc:/system/identity:node
The current node name can be checked with the following command:
svcprop -p config/nodename svc:/system/identity:node