HP StorageWorks Fabric OS 6.1.1 administrator guide (5697-0235, December 2009)

Fabric OS 6.1.1 administrator guide 157
AD0 is useful when you create Admin Domains because you can see which devices, switch ports, and
switches have not yet been assigned to any Admin Domains.
AD0 owns the root zone database (legacy zone database). During zone merge or zone update, only the
root zone database is exchanged with AD-unaware switches.
AD255
AD255 is used for Admin Domain management. You can use AD255 to get an unfiltered view of the fabric
and to view the hierarchical zone databases of AD0 through AD254. All Admin Domain management is
done in the AD255 context.
AD255 does not have a zone database associated with it; you cannot use AD255 to perform any zoning
management tasks (non-read operations such as creating or modifying zones).
Figure 8 on page 160 shows the same fabric from Figure 6, but with AD0 and AD255 shown. AD0
contains the two devices that are not in any of the user-defined Admin Domains (AD1 and AD2). AD255
encompasses the entire physical fabric.
Figure 7 Fabric with AD0 and AD255
Admin Domains and login
You are always logged in to an Admin Domain, and you can view and modify only the devices in that
Admin Domain.
If you have access to more than one Admin Domain, one of them will have been specified as your home
Admin Domain, the one you are automatically logged in to. If your home Admin Domain is deleted or
deactivated, by default you are logged in to the lowest numbered active Admin Domain in your Admin
Domain List. The home Admin Domain, like the Admin Domain list, is a configurable property of a
non-default user account. Here is some information about AD accounts:
• You can log in to only one Admin Domain at a time. You can later switch to a different Admin Domain
(see ”Switching to a different Admin Domain context” on page 171).
• For default accounts such as admin and user, the home Admin Domain defaults to AD0 and cannot be
changed.
AD2
AD255
AD1
AD0