Dell Emulex Family of Adapters - Manual (Page 268)

OneCommand™ Manager Application P010066-01A Rev. A
13. Diagnostics
LightPulse FC HBA Diagnostics
268
provides the ability to diagnose marginal cable conditions (e.g. dust in the
optics) that result in higher error rates.

D_Port should not be enabled on the switch port.

D_Port tests run with the physical connection in an offline diagnostic state, so
normal I/O cannot be sent through the physical port while the test is in
progress. While the port is in D_Port mode, the link will appear down on that
port; similar to an unplugged cable.

When using D_Port in a boot from SAN configuration, the configuration must
have redundant paths to the boot LUN and only one of the redundant adapter
ports should be set to D_Port.

For more information about D_Port, refer to the Brocade website at
www.brocade.com.

D_Port is also referred to as ClearLink.
The D_Port Tests button on the Diagnostics tab enables you to run D_Ports tests on
LPe16000 series adapters.
Figure 13-4 Diagnostics Tab for LPe16000 series adapters (D Port Tests... button depicted)
To run a D_Port test:
1. From the discovery-tree, select the LPe16000 series adapter port on which you want
to run the D_Port test.
2. Select the Diagnostics tab and click D_Port Tests... The D_Port Tests window
appears.