HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availabil - Page 111
Management Limitations, Director 2/140 140 ports, Edge Switch 2/16 16 ports, Edge Switch 2/24
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Planning Considerations for Fibre Channel Topologies Although Figure 46 depicts a UPM card map only for the Director 2/64, physical port numbers and logical port addresses can be extrapolated for the Director 2/140 (140 ports), Edge Switch 2/16 (16 ports), Edge Switch 2/24 (24 ports), and Edge Switch 2/32 (32 ports). Management Limitations The following considerations must be given to the limitations and interactions of director or switch management when using Open Systems management style (FCP) or FICON management style: ■ FICON port-to-port connectivity is hardware enforced, while FCP port-to-port connectivity is software enforced. - FICON architecture controls connectivity through a host-based HCD program, a director or switch-resident management server called the control unit port (CUP), and a director or switch-resident prohibit dynamic connectivity mask (PDCM) array associated with each logical port address. The CUP and PDCM arrays support hardware enforcement of connectivity control to all port connections; therefore when a director or switch is set to FICON management style, zoning information is restricted by the hardware instead of by the name server. - When the director or switch is set to Open Systems management style, CUP support and the PDCM array are disabled. For FICON devices attached to the director or switch, the user must manage connectivity to match logical port addressing established through the host-based HCD program. For example if a FICON host expects connectivity through logical port address 1C, the user must ensure the host is connected to physical port number 24. Refer to Figure 46 for the physical port number and logical port address map. ■ The FCP protocol supports multiple domains (multiswitch fabrics), while the FICON protocol is limited to a single domain (single-switch fabrics) due to single-byte address limitations inherited from ESCON. Consequently, when a director or switch is set to FICON management style, E_Port connections (ISLs) are not allowed with another edge switch. The director or switch reports an attempted E_Port connection as invalid and prevents the port from coming online. SAN High Availability Planning Guide 111