For HP 9000 and HP Integrity servers,
you can set the domain
IDs prior to building the multiswitch fabric and prior to rezoning.
To
decide when to set your HP 9000
and HP integrity host domain IDs, consider the following scenarios:
- When two active switches are joined, they determine if the domain
ID is already in use. If there is a conflict, it cannot be changed
in an active switch. A conflict causes an active switch to fail.
- The domain ID identifies switch ports when you implement zoning
using the domain and switch port number. If domain IDs are negotiated
at every fabric start up, there is no guarantee that switch IDs can
persist from one session to the next. If the switch ID changes, any
zoning definitions are no longer valid.
- If the domain ID is
changed after a SAN is set up, the host can
have difficulty logging back in to the switch, and you might have
to reconfigure the host configuration or detect devices on the switch
again.
- Do not use domain ID 8. Domain ID 8 limits the HP-UX host to private loop devices. If domain ID
8 is used, the HP-UX host is not able to detect the Lenovo Storage V series system.