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EMULEX MODEL 355 SAN STORAGE SWITCH
USER’S GUIDE CHAPTER 4: TECHNICAL REFERENCE
EMULEX CORPORATION 54
P
ART NUMBER 00041407-002 REV. B
CHAPTER 4TECHNICAL REFERENCE
TROUBLESHOOTING DEVICE CONNECTIONS
Troubleshooting Device Connections.........................54
Troubleshooting Management Connections ...............55
Port Bypass Conditions and Recovery.......................55
Default Smart Setting Attributes.................................56
Fibre Channel References .........................................57
Problem Recommended Action
SFP installed in one or
more ports but no LEDs
lit
1. Verify that the power cord is firmly seated into switch and is connected to
a properly earthed receptacle (outlet).
2. Check the Power LED to ensure that the switch is turned on.
3. Verify that the SFP is firmly seated.
SFP installed but only
yellow LED is lit
Reseat the SFP. If the same condition occurs, the SFP is probably faulty
and should be replaced.
SFP installed with both
green and yellow LEDs
lit
1. Make sure that the device is powered on and operating properly.
2. Unplug the fiber cable from the node and verify that an optical signal is
present on the cable receiver lead.
3. Verify that the fiber cable is fully seated at either end.
If optical power meter is available, verify the device is transmitting a
signal.
If there is no signal present, the device may require rebooting, device
drivers may need to be reinstalled, or the HBA or disk controller
hardware may require servicing.
If a signal is present on both the cable lead and the end node, the HBA or
disk controller may require service.
4. Ensure that the device and switch are operational and set to the same
speed.
SFP installed with only
green LED lit, but
devices are not
communicating
The switch is receiving a valid signal from the device, but no upper level
protocols are active.
1. Verify that the proper HBA device drivers are loaded for the appropriate
operating system and that the host has been configured to recognize
attached disk devices.
2. Improper FC-AL initialization could result from a defective or inoperative
adapter card or device. Run adapter diagnostics with a loopback
connector to see if the adapter is working properly.
3. Unplug the fiber cable from the end node and verify that an optical signal
is present on the cable receiver lead. If no signal is present, the cable’s
receiver lead may be bad and the device may be streaming F8 Failure
notifications.