HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availabil - Page 63
Public device connectivity
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Planning Considerations for Fibre Channel Topologies Figure 23: Public device connectivity Public devices support normal fabric operational requirements, such as fabric busy and reject conditions, frame multiplexing, and frame delivery order. ■ Private device - A loop device that cannot transmit an FLOGI command to the switch nor communicate with fabric-attached devices is a private device. As shown in Figure 24 on page 64, device D2 is a private loop device that cannot communicate with any fabric-attached device. However, device D2 can communicate with switch-attached server S2 (using private addressing mode). Public and private devices are partitioned into two separate address spaces defined in the Fibre Channel address, and the switch's embedded FL_Port ensures that private address spaces are isolated from a fabric. The switch does not support any other form of Fibre Channel address conversion (spoofing) that would allow private device-to-fabric device communication. Note: A private device can connect to the switch (loop) while a public device is connected and using the B_Port to communicate with a fabric device. SAN High Availability Planning Guide 63