Director Or Switch Management - HP 316095-B21 - StorageWorks Edge Switch 2/24 Planning Manual

Director or Switch Management

When intermixing FCP and FICON protocols, it must be determined if the
director or switch is to be managed through Open Systems management style or
FICON management style. This setting affects only the management style used to
manage the director or switch; it does not affect Fibre Channel port operation.
FCP devices can communicate with each other when the attached fabric element
is set to FICON management style, and FICON devices can communicate with
each other when the attached fabric element is set to Open Systems management
style.
When a director or switch is set to Open Systems management style, FCP
connectivity is defined within a Fibre Channel fabric using WWNs of devices that
are allowed to form connections. When connecting to the fabric, an FCP device
queries the name server for a list of devices for which connectivity is allowed.
This connectivity is hardware enforced through a name server zoning feature that
partitions attached devices into restricted-access zones.
When a director or switch is set to FICON management style, host-to-storage
FICON connectivity and channel paths are defined by a host-based hardware
configuration definition (HCD) program, a director or switch-resident
management server called the control unit port (CUP), and a user-configured (and
director or switch-resident) prohibit dynamic connectivity mask (PDCM) array
associated with each logical port address. FICON devices do not query the name
server for accessible devices because connectivity is defined at the host. This
connectivity is hardware enforced in the routing tables of each port.
Note:
FICON management style or the transmission of FICON frames.
PDCM connectivity control is configured and managed at the director or switch
level using the Configure Allow/Prohibit Matrix - Active dialog box
(Figure
Note:
can render ISLs unusable and cause complex routing problems. These problems can
be difficult to fault isolate and sometimes manifest incorrectly as end-device issues.
SAN High Availability Planning Guide
The Edge Switch 2/12 and Edge Switch 2/24 do not support operation using
57). For additional information, refer to
When configuring a PDCM array that prohibits E_Port connectivity, mistakes
Planning Considerations for Fibre Channel Topologies
"PDCM Arrays" on page 149.
111