Troubleshooting

Interpreting LED Error Patterns

Interpreting LED Error Patterns

Whenever the hub is powered on or reset, and whenever the router module is reset (page 3-5) or cleared (page 3-7), a self-test of the router is run.

If the self-test was initiated by powering on or resetting the hub, this self-test can last up to 30 seconds if the hub had previously been powered on with the SNMP module installed, or up to 60 seconds if the hub had not previously been powered on with the SNMP module installed. During this time, the Fault LED on the front of the hub is turned on, the Exp Slot LED (labeled “AdvSlot” on some HP Advance- Stack hubs) flashes slowly, and the Router Self-test LED on the router module’s cover plate is turned on. If the hub’s Fault LED remains on and the Exp Slot LED continues flashing for more than 60 seconds, a failure has been found during the self-test.

If the self-test was initiated by resetting or clearing the router module, the self-test lasts about 18 seconds; during this time, the Router Self-test LED on the router module’s cover plate is turned on. If this LED remains on for more than about 18 seconds, a failure has been found during the self-test.

When a failure has been found during the self-test, check the LEDs on the router module’s cover plate (see figure 3-1) to determine the cause of the failure. The error conditions indicated by these LEDs are shown in table 4-1 on page 4-4.

During router operation (that is, after the self-test has been passed), the Fault LED on the front of the hub is normally off, and the Exp Slot LED (labeled “AdvSlot” on some HP AdvanceStack hubs) is normally on. If a failure is found during router operation, the Fault LED on the front of the hub turns on and the Exp Slot LED flashes slowly. When this happens, check the LEDs on the router module’s cover plate (see figure 3-1) to determine the cause of the failure. The error conditions indicated by these LEDs are shown in table 4-2 on page 4-5.

Troubleshooting 4

4-3

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HP 210 manual Interpreting LED Error Patterns
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