IBM SAN32M-2, Installation And Service Manual

Page: 211 / 312

185 Chapter 4: Repair information
b. Select Reset Port . A message box displays, indicating a link
reset will occur.
c. Click OK . The port resets.
10. Notify the customer the test is complete and the attached device
can be set online.
External loopback
test
An external loopback test checks all port circuitry, including
fiber-optic components of the installed optical transceiver. To perform
the test, the attached device must be quiesced and disconnected from
the port, and a singlemode or multimode loopback plug must be
inserted in the port. To perform the test:
1. Notify the customer that a disruptive external loopback test is to
be performed and the attached device must be disconnected.
2. Disconnect the fiber-optic jumper cable from the port to be tested.
3. Depending on the port technology, insert a singlemode or
multimode loopback plug into the port receptacle.
4. At the Element Manager application (management server), select
Port Diagnostics from the Maintenance menu. The Port Diagnostics
dialog box displays ( Figure 59 ).
5. Type the port number to be tested or select all ports at the Port
Select area of the dialog box.
6. At the Diagnostics Test list box, select the External Loop option.
7. Click Next . At the Port Diagnostics dialog box, the message
Loopback plug(s) must be installed on ports being diagnosed
appears.
8. Verify a loopback plug is installed and click Next . The message
Press START TEST to begin diagnostics
appears, and the Next
button changes to a Start Test button.
9. Click Start Test . The test begins and:
a. The Start Test button changes to a Stop Test button.
b. The message Port xx: TEST RUNNING appears.
c. A red progress bar (indicating percent completion) travels
from left to right across the Completion Status field.
10. When the test completes, results appear as Port xx: Passed! or
Port xx: Failed! in the message area of the dialog box.