If would like to change the host-name in Solaris 11, it's quite simple and much simpler nowadays. You can basically do it in only 2 steps.
 
1 - First of all you should check the current properties of the system using svccfg:
 
reny@solaris11_2:~$ svccfg -s system/identity:node listprop config
config                       application        
config/enable_mapping       boolean     true
config/ignore_dhcp_hostname boolean     false
config/nodename             astring     solaris11_2
config/loopbac...

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