ServerNet Cluster Manual

Troubleshooting and Replacement Procedures
ServerNet Cluster Manual—520575-003
7-30
Using the Internal Loopback Test Action
Use the following procedure to check ServerNet connectivity on the external fabrics:
1. Log on to the TSM Service Application. For a detailed description of logging on to
the TSM Service Application, see Appendix F, Common System Operations.
2. In the Management window tree pane, click the Cluster tab.
3. In the tree pane, right-click either the External_ServerNet_X_Fabric or the
External_ServerNet_Y_Fabric and select Actions. The Actions dialog box
appears.
4. From the Actions list, click Node Connectivity ServerNet Path Test.
5. Click Perform action. The Action Status window shows the progress of the action.
6. Check for an alarm on the External_ServerNet_X_Fabric or the
External_ServerNet_Y_Fabric. If no alarm is present, the action completed
successfully.
If an alarm is present (an alarm bell appears next to the object), click the object to
select it. See Using TSM Alarms on page 7-12 to get more information about the
alarm.
Using the Internal Loopback Test Action
If you need to execute an internal loopback test, HP recommends that you use the
guided procedure for troubleshooting a ServerNet fabric (Troubleshoot ServerNet
Fabric). The guided procedure automates the process of performing internal and
external loopback tests on a variety of PICs. See Using the Fabric Troubleshooting
Guided Procedure to Check the Internal ServerNet Fabrics on page 7-26. The guided
procedure provides the same function as the TSM Internal Loopback Test action.
The Internal Loopback Test action tests the circuitry of a plug-in card (PIC) installed in
an MSEB to determine if ServerNet traffic can pass through the PIC. You can use the
Internal Loopback Test Action on a PIC installed in any port of an MSEB. However, you
can only perform this action on one PIC at a time.
The Internal Loopback Test action indicates with high probability whether or not the
PIC circuitry is operational or faulty. However, it does not test the connector on the PIC.
As a result, it is possible that the Internal Loopback Test Action can succeed even
though communication through the PIC is not possible.
Note. An error will be returned if you try to run this path test when another Node Connectivity
ServerNet Path Test is in progress on the same fabric. The Path Test in Progress attribute
indicates if a path test is currently being conducted on the fabric.
Caution. Use the Internal Loopback Test action only if you have been instructed to do so by
your service provider or by the repair action text for a TSM alarm. Do not use the Internal
Loopback Test action on a PIC that you believe is operating normally. Doing so will shut down
ServerNet traffic through the PIC.