User`s guide

Chapter 4. Implementing the SAN Data Gateway 319
Another option here is to utilize the zoning and LUN masking capabilities of the
SAN Data Gateway. This would ensure that certain volumes can only be
accessed on one Fibre Channel Gateway port and by a particular host.
Also available is to add zoning within the switch. The switch Fibre Channel ports
can be zoned so that the host only has one path to the SAN Data Gateway. This
would be used in combination with the zoning and LUN masking features of the
SAN Data Gateway.