System Administration Guide: Oracle Solaris Containers-Resource Management and Oracle Solaris Zones

Host ID in Zones

You can set a hostid property for the non-global zone that is different from the hostid of the global zone. This would be done in the case of a physical machine consolidated into a zone using the physical to virtual capability. Applications now inside the zone might depend on the original hostid, and it might not be possible to update the application configuration. See Resource and Property Types for more information.