Repair Information

13. Reset each tested port.

External Loopback Test

To perform an external loopback test for a single port:

1.Notify the customer that a disruptive external loopback test will be performed on a port and the fiber-optic cable or cables will be disconnected. Ensure the customer’s system administrator quiesces Fibre Channel frame traffic through the port and sets attached devices offline.

NOTE: At the start of the loopback test, the port can be online, offline, blocked, or unblocked.

2.At the HAFM server, open the HAFM application. The Product View displays.

3.Select the icon representing the switch for which the loopback test is to be performed. The Hardware View for the selected switch displays.

4.At the Hardware View, verify the location of the port to be tested. When the mouse pointer is passed over the graphical port on the front view of the switch, the port highlights with a blue border and an pop-up displays Switch Port.

5.Disconnect the fiber-optic jumper cable from the port.

CAUTION: If name server zoning is implemented for the switch by port number, ensure the fiber-optic cables that are disconnected to perform the loopback test are reconnected properly. A change to the cable configuration disrupts zone operation and may incorrectly include or exclude a device from a zone.

6.If the port to be tested is shortwave laser (determined in step 4), insert a black multi-mode loopback plug into the port receptacle. If the port to be tested is longwave laser (also determined in step 4), insert a blue single-mode loopback plug into the port receptacle.

7.At the navigation control panel, select Port Diagnostics from the Maintenance menu. The Port Diagnostics dialog box displays (Figure 3–14).

8.Select a port for test. To select a port for test, type the port number (0 through 31) in the Port Number field.

9.At the Diagnostics Test list box, select External Loopback.