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

Cause/Solution

 

 

 

The host cannot access the

–

The port is bypassed in Fibre Channel Manager. If you are

device, and the Port LED is off.

 

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-Mbps FC-AL device.

 

 

 

The device is good, and the Port

–

The cable is incompatible with the hub. Replace the cable

LED comes on when a loopback

 

with a 50 or 62.5-micron multimode fiber optic cable.

cable is connected to the hub

–

A short-wave port is connected to the long-wave port on

port.

 

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 Port LED remains off when a

–

The hub port is dirty. Try cleaning the port by gently

loopback cable is connected to

 

blowing with clean, dry compressed air (see chapter 5,

the hub port.

 

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