Q-Logic 5200 Manuel D’Utilisation

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5 – Managing Ports
Testing Ports
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5.5
Testing Ports
The port loopback tests verify correct port operation by sending a frame out 
through the loop, and then verifying that the frame received matches the frame 
that was sent. Only one port can be tested at a time for each type of test. The Port 
Loopback Test dialog shown in 
 presents the following loopback tests:
Figure 5-4.  Port Loopback Test Dialog
„
SerDes level (Internal) - The SerDes level test verifies port circuitry. The 
SerDes level test sends a test frame from the ASIC through the SerDes chip 
and back to the ASIC for the selected ports. The port passes the test if the 
frame that was sent by the ASIC matches the test frame that was received. 
This test requires that the port be in diagnostics mode, and therefore, 
disrupts communication.
„
SFP level (External) - The SFP level test verifies port circuitry. The SFP 
level test sends a test frame from the ASIC through the SerDes chip, 
through the SFP transceiver fitted with an external loopback plug, and back 
to the ASIC for the selected ports. The port passes the test if the test frame 
that was sent by the ASIC matches the test frame that was received. This 
test requires that the port be in diagnostics mode, and therefore, disrupts 
communication.