Dell Brocade G620 Brocade 8.0.1 Fabric OS Administratiors Guide - Page 418
Adapter HBA, or an Access Gateway and an HBA/device, ISLs, and ICLs., Dynamic, con On-demand
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Diagnostic Port ∙ Dynamic - The port is automatically set to a D_Port based on an external request from a remote port on the other end of the connection. In this mode, the port remains a D_Port until all the diagnostic tests are completed and the remote port reverts to normal mode. For the port to become a dynamic D_Port, the remote port on the other end of the connection must be either a static D_Port or an on-demand D_Port. Dynamic D_Port mode is supported on connections between a switch and a Host Bus Adapter (HBA), or an Access Gateway and an HBA/device, ISLs, and ICLs. By default, a switch has the capability to support dynamic D_Port mode. You can disable this capability by using the configure command, as shown in the following example. switch:admin> configure Configure... Fabric parameters (yes, y, no, n): [no] Virtual Channel parameters (yes, y, no, n): [no] F-Port login parameters (yes, y, no, n): [no] D-Port parameters (yes, y, no, n): [no] y Dynamic D-Port (on, off): [on] off NOTE Changes are reflected in the RASLog. ∙ On-demand - This mode is off by default and must be enabled. The port then becomes a D_Port as a result of an internal request or event within the local switch such as the slotpoweroff, slotpoweron, slot insert, portcfgPersistentDisable and portcfgPersistEntenable commands. In this mode, the port remains a D_Port until all the diagnostic tests are completed successfully. If any of the tests fail, the port continues to remain a D_Port. For a switch port to work as an on-demand D_Port, the other end of the connection must support dynamic D_Port capability. With Fabric OS 7.3.0 on switches and chassis, ondemand D_Port mode can be configured by means of a switch-wide command, and is supported by default on switches and chassis (ISLs and ICLs). The following internal events within a switch or chassis can trigger a port to become a D_Port: - slotpoweroff and slotpoweron - Slot or blade insert - portcfgPersistentDisable and portcfgPersistentEnable commands Once on-demand D_Port configuration is enabled on the switch and any of the on-demand triggers have been issued (such as slotpoweroff, slotpoweron, slot insert), then the port comes up in on-demand D_Port mode. If dynamic D_Port is supported, the on-demand D_Port forces the remote port to dynamic D_Port mode, triggers the diagnostic tests automatically, and then changes back to normal port mode after successful completion of the tests. By default, a switch does not support on-demand D_Port mode. You can turn this capability on by using the configure command, as shown in the following example. switch:admin> configure Configure... Fabric parameters (yes, y, no, n): [no] Virtual Channel parameters (yes, y, no, n): [no] F-Port login parameters (yes, y, no, n): [no] D-Port parameters (yes, y, no, n): [no] y Dynamic D-Port (on, off): [on] On Demand D-Port (on, off): [off] on NOTE Even if the on-demand D_Port option is enabled, if any static D_Port configuration is enabled on a port, then that static configuration takes precedence. The following table summarizes D_Port test initiation modes and test start behavior. Brocade Fabric OS Administration Guide, 8.0.1 418 53-1004111-02