EMC Connectrix EC-1200 Planning Manual page 73

Zoning and Naming
3
Zoning in a Connectrix fabric is fabric-wide; a zone set is applied to
the whole fabric. The zones can span switches; for example, you can
have a host HBA connected to an ED-64M in Data Center A, zoned
with a set of Symmetrix ports in Data Center B. There might be
dozens of other Symmetrix ports in Data Center A but, due to the
zoning, when the HBA performs device discovery, or responds to
changes in the topology, it will only log in to those Symmetrix ports
in Data Center B that have been assigned to its zone. If the zones have
been set up using World Wide Names (the recommended practice),
then even if the Symmetrix ports need to be moved from one physical
port to another port in Data Center B, the distributed Name Server in
the fabric will ensure that the new DIDs are deliverd to the HBA in
Data Center A.
Since zones are basically a set of destination ports who are allowed to
"see" one another, the ISLs each of these destination ports use are
transparent to the zone management. ISLs can be added to or
removed from the fabric; however, as long as a path remains between
a source and its destination, the Zoning behavior will be uneffected
by the ISL route assignment changes.
Future generations of Fibre Channel switching will incorporate
hardware-based zoning that will be able to block access from any
HBA, no matter what policies it might follow. Until these switches are
available, it is required that only EMC-approved HBAs and device
drivers be used on a Connectrix fabric. Volume Logix™ provides
protection for the storage devices, but does not provide protection for
the Connectrix fabric from unsupported device drivers.
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Zoning