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76 If a Port LED Is Off
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 page79.
Symptom Cause/Solution
The host cannot access the
device, and the Port LED is off.
– 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-Mbps FC-AL device.
The device is good, and the Port
LED comes on when a loopback
cable is connected to the hub
port.
– 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
chapter5, Maintenance and Replacement).
– The cable is bent or broken. Replace the cable.
The Port LED remains off when a
loopback cable is connected to
the hub port.
– The hub port is dirty. Try cleaning the port by gently
blowing with clean, dry compressed air (see chapter5,
Maintenance and Replacement). Reattach the loopback
cable and see if the Port LED is on.
– The hub port is faulty. Replace the hub.