User`s guide

296 Implementing an Open IBM SAN
When this command is issued, you will also be given an option to clear the Virtual
Private SAN (VPS) access settings. Because this allows host access to specific
LUNs and by issuing this command, we may change the assigned LUN ID; it is
recommended that you always say Yes to this option. If not, a host may access a
volume that you do not want it to access and be restricted from a volume that it
had access to previously. The system administrator must rebuild the VPS
settings, if enabled, to allow host access to the desired LUNs.
4.5 SAN Data Gateway access options
The SAN Data Gateway includes two features that are helpful in providing control
and security of host access to SCSI devices:
򐂰 Zoning
򐂰 Virtual Private SAN (or LUN masking)
4.5.1 Zoning
Channel zoning is a feature included with the IBM Storage Area Network Data
Gateway. Zoning allows you to restrict access between SAN Fibre Channel
connections and SCSI channels. The default settings allow all SAN connections
to access all SCSI channels.
Configuring zoning
To configure zoning, and you must be an administrator, select Control ->
Access Options -> Channel Zoning from the toolbar. Figure 4-28 shows a
zoned SAN Data Gateway.
Figure 4-28 IBM Storage Area Network Data Gateway channel zoning