11
Troubleshooting
Hardware Diagnostics
Loopback diagnostic tests are available for testing the NIC hardware under Windows. These tests provide access to NIC internal/external diagnostics, where packet information is transmitted across the physical link. See “Diagnostics” on page 87.
Checking Port LEDs
The NIC has four LEDs, one for each port speed option (10 Mbps, 100 Mbps, and 1 Gbps), and one for Data Transfer. The three port speed LEDs indicate active links, and the data LED indicates data transfer status. When the driver has been loaded and the cables are connected properly, the appropriate speed LED is lit and the data LED is on if data traffic is present.
Before the port LEDs can provide troubleshooting information, the NIC must be connected to the network (see “Installing and Connecting the NIC” on page 7) and the network drivers for your particular operating system must be installed.
1Verify that the NIC driver software has been installed and that the NIC is connected to a network.
2Check to see that the NIC status LEDs operate as described in the following table:
LED | State | Description |
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1000 | On | Good Gigabit Ethernet link. |
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| Off | No 1000 Mbps link; possible link at different speed, possible bad cable, bad |
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| connector, or configuration mismatch. |
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100 | On | Good 100 Mbps Fast Ethernet link. |
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| Off | No 100 Mbps link; possible link at different speed, possible bad cable, bad |
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| connector, or configuration mismatch. |
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10 | On | Good 10 Mbps Ethernet link. |
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| Off | No 10 Mbps link; possible link at different speed, possible bad cable, bad |
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| connector, or configuration mismatch. |
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ACT | Blinking | Brief bursts of data detected on the port. |
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| On | Streams of data detected on the port. |
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| Off | No data detected on the port. |
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