Vixel 335 Fibre Channel References, Small Form-Factor Pluggable SFP Issues, Technical Reference

Vixel Model 335 Installation & Configuration Guide CHAPTER 4 Technical Reference

Small Form-Factor Pluggable (SFP) Issues

Items to check for common SFP-related symptoms are listed below.

Problem	Recommended Action
SFP installed in one or	Verify power cord is firmly seated into switch and is connected
	to a properly earthed receptacle (outlet).
more ports but no LEDs lit
	Check the Power LED to ensure switch is turned on.
SFP installed but only	Re-seat the SFP. If the same condition occurs, the SFP is
yellow LED is lit	probably faulty and should be replaced.
	The switch is not receiving a valid Fibre Channel signal from the
	end node (HBA or disk array) or is receiving LIP(F8).
	1) Ensure 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.
SFP installed with both	3) Examine the connectors on the HBA or disk controller for
	correct and proper connection. If optical power meter is
green and yellow LEDs lit
	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.
	The switch is receiving a valid Fibre Channel signal from the end
	device (HBA or disk), 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) Check the Switch Op LED. If the Switch Op LED is on, the
	devices have completed initialization. If the Switch Op LED is
SFP installed with only	off, the devices were not initialized. Remove all the devices and
	add one device at a time to isolate the device responsible for the
green LED lit, but devices
	failure.
are not communicating
	3) Improper 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.
	4) 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 receiver lead of the cable may be bad and the device
	may be streaming LIP(F8). Ensure that all cascaded ports are
	correctly configured.

Fibre Channel References

The following books give useful information about Fibre Channel.

•Alan F. Benner, Fibre Channel. McGraw-Hill, 1996. ISBN 0-07-005669-2.

•Tom Clark, Designing Storage Area Networks. Addison Wesley Longman, 1999, ISBN 0-201-61584-3.

•Jan Dedek, Fibre Channel - The Basics. ANCOT Corporation, 1997. ISBN 0-9637439-3-7.

•Robert Kembel, Arbitrated Loop. Connectivity Solutions, 1996. ISBN 0-931836-82-4.

•Robert Kembel, A Comprehensive Introduction. Connectivity Solutions, 1998. ISBN 0-931836-84-0.

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