Dell Emulex Family of Adapters - Manual (Page 277)

OneCommand™ Manager Application P010066-01A Rev. A
13. Diagnostics
OneConnect Diagnostics
277
All functions are supported locally and remotely on hosts managed with TCP/IP
access. Test results and the status of running tests are time stamped and appear in the
Test Status area.
Figure 13-14 Diagnostics Tab (10GBASE-T adapter selected)
OneConnect Loopback Test Combinations
Run the following loopback test combinations using the appropriate checkboxes:

DMA Loopback Test – (For OCe10102-FM and OCe11102-FM adapters only.)
The DMA loopback test sends data from the host to the adapter, then back to the
host, where it is checked for data miscompute errors. All tests except the DMA
loopback test are run on the currently selected port. The DMA loopback test is
run across the entire adapter. The same diagnostic is therefore executed
regardless of the currently selected physical port. Also, unlike other diagnostics,
this test affects the operation of all ports on the adapter. (Not available on ESXi
systems.)

PHY Loopback Test – The PHY loopback test connects the transmit output of
the physical layer to the receive input of the physical layer. The data is
transmitted, received and checked for data miscompute errors.
Note: PHY diagnostics are not supported on mezzanine cards and blade
network daughter cards because they do not contain PHYs.

External Loopback Test – A diagnostic test in which a random data pattern is
sent down to an adapter link port. The data goes out the port and immediately
returns via a loopback connector. The returned data is subsequently validated
for integrity. (Not available on 10GBASE-T adapters.)

MAC Loopback – MAC loopback connects the transmit output of the MAC
controller to the receive input of the MAC controller (bypassing the PHY).