Features That Impact Protocol Intermixing; Hardware-Enforced Zoning - HP 316095-B21 - StorageWorks Edge Switch 2/24 Planning Manual

Planning Considerations for Fibre Channel Topologies

Features that Impact Protocol Intermixing

The following features impact how a director or switch behaves when deployed in
an intermixed environment:

Hardware-Enforced Zoning

Hardware-enforced zoning (hard zoning) allows a user to program director or
switch route tables that enable hardware logic to route Fibre Channel frames. This
process prevents traffic between source and destination devices not in the same
zone. Hard zoning provides the open-systems environment with the same
protection that PDCM arrays provide in the FICON environment.
In environments that include discovery-oriented devices (FCP) and
definition-oriented devices (FICON), system administrators must keep device
definitions and zoning definitions synchronized. Hard zoning enforces zoning
information at the director or switch level and ensures that the information takes
precedence over access definitions configured at the device level. This provides a
security element that is useful for mixed environments that use both definition and
discovery. For additional information, refer to "Zoning" on page 154.
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allowed with another fabric switch. The director or switch reports an
attempted E_Port connection as invalid and prevents the port from
coming online.
— For later versions of director or switch firmware (version 4.0 and later),
the domain field of the destination ID is added to the Fibre Channel link
address, thus specifying the link address on source and target fabric
elements and enabling E_Port (ISL) connectivity. This connectivity is
called FICON cascading. For additional information, refer to
Cascading" on page 124.
When employing inband (Fibre Channel) director or switch management, the
open-systems management server (OSMS) is associated with the FCP
protocol, and the FICON management server (FMS) is associated with the
FICON protocol. Management server differences tend to complicate security
and control issues.
Each server provides facilities to change zoning information (FCP protocol)
or the logical port address-based connectivity configuration (FICON
protocol), but neither provides sufficient functionality for both protocols.
Hardware-Enforced Zoning
SANtegrity Binding
FICON Cascading
SAN High Availability Planning Guide
"FICON