HP L10 manual If a Port LED Is Off, Cable is bent or broken. Replace the cable

If a Port LED Is Off

If a Port LED is off where a cable is connected, find the symptom that best describes the situation, then attempt the solution. When more than one solution is possible, the most likely one is listed first.

If all port LEDs are off where cables are connected, see If Firmware Upgrade Appears to Fail on page 79.

Symptom

The host cannot access the device, and the Port LED is off.

The device is good, and the Port LED comes on when a loopback cable is connected to the hub port.

The Port LED remains off when a loopback cable is connected to the hub port.

Cause/Solution

–The port is bypassed in Fibre Channel Manager. If you are using Fibre Channel Manager to manage the hub, verify that the port in question is enabled. (See the HP Fibre Channel Manager User Manual for more information.)

–The device is faulty or offline. Verify that the device is turned on and has successfully completed its self-test.

–The device is incompatible with the hub. Replace with a non-OFC,short-wave,1063-MbpsFC-AL device.

–The cable is incompatible with the hub. Replace the cable with a 50 or 62.5-micron multimode fiber optic cable.

–A short-wave port is connected to the long-wave port on another hub. When cascading hubs, only connect long- wave ports to long-wave ports and short-wave ports to short-wave ports. Reconnect the hubs accordingly.

–The connector is dirty. Clean both ends of the cable with high purity alcohol and wipe with a soft, lint-free cloth (see chapter 5, Maintenance and Replacement).

–The cable is bent or broken. Replace the cable.

–The hub port is dirty. Try cleaning the port by gently blowing with clean, dry compressed air (see chapter 5, Maintenance and Replacement). Reattach the loopback cable and see if the Port LED is on.

–The hub port is faulty. Replace the hub.

76If a Port LED Is Off