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indicator will be steady green. If a slow green blink is observed, it indicates the port
is seeing light but cannot make a proper loop connection. This could indicate a
possibly defective cable.
When frame traffic is being transferred on a port, the LED flickers fast green,
showing the port is active and transferring data.
After the POST diagnostics are run, the hub power-on (ready) LED indicates that
the system board diagnostics have completed successfully.
Hub diagnostics
The 3534 hub is designed for maintenance-free operation. If you suspect a failure,
use the self-diagnostic capabilities of the hub to help isolate any equipment or Fibre
Channel (FC) loop failures.
The hub supports POSTs and diagnostic tests.
Verifying power-on self test (POST)
Table 19 lists the diagnostic tests that automatically run during a POST.
Table 19. Hub POST tests
Test Description
Memory test Checks the CPU RAM memory
Port register test Checks the ASIC registers and SRAMs
Central memory test Checks the system board SRAMs
CMI Conn test Checks the CMI bus between ASICs
CAM test Checks the CAM
Port loopback test Checks all of the hub hardware to ensure the frames are
transmitted, looped back, and received.
After the hub completes the POST, the indicator returns to a steady state from the
blinking states shown during the tests. If a yellow indicator light is displayed, this
indicates that the port failed one of the POSTs. If error conditions are encountered,
they can be displayed through Telnet after the hub completes the POST.
The hub ready LED can be used to verify successful POST approximately 2
minutes after power-on.
Running diagnostics
The diagnostic tests determine the status of the hub and isolate problems. You run
the diagnostic tests with Telnet commands. For more information about running
diagnostics, see “Appendix E. Setup procedures and diagnostics for the Fibre
Channel Hub” on page 155. The following tests are available:
v
Hub offline (switchDisable)
v
Memory test (ramTest)
v
Port register test (portRegTest)
v
Central memory test (centralMemoryTest)
v
CMI Conn test (cmiTest)
v
CAM test (camTest)
v
Port loopback test (portLoopbackTest)
v
Cross port test (crossPortTest)
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Model 326 User’s Reference