ServerNet Cluster Manual

Troubleshooting and Replacement Procedures
ServerNet Cluster Manual—520575-003
7-31
Using SCF to Check Processor-to-Processor
Connections
Typically, you use the Internal Loopback Test action to isolate the cause of a
malfunctioning ServerNet path where a PIC is part of that path. You can perform the
action with a ServerNet cable connected to the PIC. The action isolates the MSEB port
occupied by the PIC, preventing the port from sending or receiving ServerNet traffic
during the action. However, the action tests only the PIC and not the cable connected
to it.
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. Click the System tab of the management window.
3. In the tree pane, right-click the PIC that you want to test (PICs are subcomponents
of MSEBs), and select Actions. The Actions dialog box appears.
4. From the Actions List, click Internal Loopback Test.
5. Click Perform action. The Action Status window shows the progress of the action.
The action status indicates that action completed or failed. If the action completed,
there is a high probability that the PIC is functioning normally.
If the action failed, click the Action detail button to get more information.
6. Click Close to close the Action dialog box.
Using SCF to Check Processor-to-Processor Connections
You can use the SCF STATUS SUBNET command to check processor-to-processor
connections. For details, see the STATUS SUBNET, DETAIL Command Example
(Partial Display) on page 8-15.
Finding ServerNet Cluster Event Messages in the Event Log
Before you search the event log ($ZLOG) for ServerNet cluster subsystem event
messages, you should be familiar with the subsystems listed in Table 7-5
.
Table 7-5. Names of Associated Subsystems
Subsystem
Subsystem
Name
Subsystem
Number What to Look For
ServerNet cluster SCL 218 Messages that indicate a fabric or a
node has been disconnected
SANMAN SMN 237 Messages that indicate attachment to
the HLRF (external ServerNet fabric)
failed. Or messages that indicate that
the HLRF (external ServerNet fabric)
was not discovered.
Message system IPC 203 Messages that indicate a path is down
or a fabric is down.