Service manual

4
Repair Procedures - SAN Management Application
4-41
Repair Information
Internal Loopback
Test
An internal loopback test checks internal port, serializer, and
deserializer circuitry and checks for the presence of an optical
transceiver, but does not check fiber-optic components of the
installed transceiver. Operation of the attached device is disrupted
during the test. To perform the test:
Notify the customer a disruptive internal loopback test is to be
performed. Ensure the system administrator quiesces Fibre Channel
frame traffic through the port and sets the attached device offline.
NOTE: A small form factor pluggable (SFP) optical transceiver must be
installed in the port during the test. A device can remain connected
during the test.
1. Select Port Diagnostics from the Maintenance menu
(Maintenance>Port Diagnostics). The Port Diagnostics dialog box
appears (Figure 4-14).
2. Type the port number to be tested or select all ports at the Port
Select area of the dialog box.
3. Select the Internal Loop option at the Diagnostics Test list box.
4. Click Next. The message Press START TEST to begin diagnostics
appears, and the Next button changes to a Start Test button.
Vendor Part # The vendor part number.
Revision The revision number.
Serial # The serial number.
Date Code The date.
Fiber used and Maxi-
mum length
Shows link lengths that are possible based on the fiber type installed. Fields are blank if
data is not available.
Table 4-9 Port Technology Table
Port Property Description