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edge switch 2/16 service manual 3–29
Repair Information
10. Click Next. Beaconing initiates for the port selected for test. At the Hardware
View, a yellow triangle appears at the top of the port. At the Port Diagnostics
dialog box, the message Loopback plug(s) must be installed on ports being
diagnosed appears.
11. Verify loopback plug(s) are installed and click Next. The message Verify selected
ports are beaconing appears.
12. Verify beaconing is enabled, then click Next. The message Press START TEST
to begin diagnostics appears, and the Next button changes to a Start Test button.
13. Click Start Test. The test begins and:
— The Start Test button changes to a Stop Test button
—The message Port xx: TEST RUNNING appears, where xx is the port
number.
— A red progress bar (indicating percent completion) travels from left to right
across the Completion Status field.
As a port is tested, the amber LED flashes (beacons) and the green LED
illuminates (indicating loopback traffic through the port).
NOTE: Click
Stop Test
at any time to abort the loopback test.
14. When the test completes, test results appear (for each port tested) as Port xx:
Passed! or Port xx: Failed! in the message area of the dialog box. If a port fails
the test, the amber LED for the port remains illuminated.
15. When finished, click Cancel to close the Port Diagnostics dialog box and return to
the Hardware View. Beaconing is disabled for the port.
16. Reset each tested port.
17. Remove loopback plug(s) from the tested ports.
18. Reconnect fiber-optic jumper cables from devices to tested ports.
Perform Channel Wrap Test
A channel wrap test is a diagnostic procedure that checks S/390 host-to-switch
connectivity by returning the output of the host as input. The test is host-initiated, and
transmits Fibre Channel frames to a switch port. A port enabled for channel wrapping
echoes the frame back to the host.
To perform a channel wrap test for a single port (S/390 mode only):