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6 – Managing Ports
Testing Ports
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6.6
Testing Ports
You can test a port using the Port Diagnostics dialog. Only one port can be tested
at a time for each type of test. The Port Diagnostics dialog shown in Figure 6-6
presents the following tests:
Online
— a non-disruptive test that verifies communications between the
port and its device node or device loop. The port being tested must be online
and connected to a remote device, and therefore, does not disrupt
communication. The port passes the test if the frame that was sent by the
ASIC matches the frame that was received.
Internal
— a disruptive test that 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.
External
— a disruptive test that 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.
Figure 6-6. Port Diagnostics Dialog