Assigning Device Alias Modes
When operating in basic mode, which is the default mode, the device alias is immediately expanded to a pWWN. In basic mode, when device aliases are changed to point to a new HBA, for example, that change is not reflected in the zone server. Rather, users must remove the previous HBA's pWWN, add the new HBA's pWWN, and then reactivate the zoneset.
When operating in enhanced mode, applications accept a device alias name in its "native" format. Instead of expanding the device alias to a pWWN, the device alias name is stored in the configuration and distributed in its native device alias format. So applications such as zone server, IVR, PSM or DPVM can automatically keep track of the device alias membership changes and enforce them accordingly. So the primary benefit of operating in enhanced mode is that you have a single point of change.
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