B SFP Module Replacement

B SFP Module Replacement
A P P E N D I X
B
SFP Module Replacement
This chapter describes how to replace small-form-factor pluggable (SFP) modules. SFP modules are
inserted into the SFP module slot on the Cisco 3270 Rugged Router card. These modules provide the
uplink optical interfaces, laser send (TX) and laser receive (RX).
The following are qualified Gigabit SFP modules:
•
Gigabit Multi-Mode SFP (Cisco part number: GLC-SX-MM-RGD):
•
Gigabit Single-Mode SFP (Cisco part number: GLC-LX-SM-RGD):
Each SFP must be of the same type as the SFP on the other end of the cable, and the cable must not
exceed the stipulated cable length for reliable communications. Figure B-1 shows an SFP module that
has a bale-clasp latch.
Caution
We strongly recommend that you not install or remove the SFP module while the fiber-optic cable is
attached to it because of the potential damage to the cables, to the cable connector, or to the optical
interfaces in the SFP module. Disconnect the cable before you remove or install an SFP module.
Removing and installing an SFP module can shorten its useful life. Do not remove and insert SFP
modules more often than is necessary.
SFP Module with a Bale-Clasp Latch
86575
Figure B-1
Caution
To avoid damaging the cables, follow standard fiber optic cleaning procedures when connecting fiber
optic cables to fiber-optic ports.
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Appendix B
SFP Module Replacement
Replacing SFP Modules into SFP Module Slots
This section describes how to replace an SFP module.
Warning
Class 1 laser product. Statement 1008
To insert an SFP module into the SFP module slot, follow these steps:
Step 1
Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface on the chassis.
Step 2
Remove the antenna end cap by using a 3/8-in. wrench to loosen the bolts.
Step 3
Disconnect the LC from the SFP module.
For reattachment, note which cable connector plug is send (TX) and which is receive (RX).
Tip
Step 4
Insert a dust plug into the optical ports of the SFP module to keep the optical interfaces clean.
Caution
Step 5
Do not touch the optical surfaces.
Unlock and remove the SFP module.
Figure B-2
Disconnecting SFP Latch Mechanisms
1
2
3
4
A
117722
B
Step 6
Pull the bale-clasp latch out and down to eject the module. If the bale-clasp latch is obstructed and you
cannot use your index finger to open it, use a small, flat-blade screwdriver or other long, narrow
instrument to open the bale-clasp latch.
Step 7
Grasp the SFP module between your thumb and index finger, and carefully remove it from the module
slot.
Step 8
Place the removed SFP module in an antistatic bag or other protective environment.
Caution
Do not remove the rubber plugs from the SFP module port or the rubber caps from the
fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the SFP
module ports and cables from contamination and ambient light.
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SFP Module Replacement
Step 9
Find the send (TX) and receive (RX) markings that identify the top side of the replacement SFP module.
On some SFP modules, the send and receive (TX and RX) markings might be replaced by arrows
that show the direction of the connection, either send or receive (TX or RX).
Note
Step 10
Align the SFP module in front of the slot opening.
Step 11
Insert the SFP module into the slot until you feel the connector on the module snap into place in the back
of the slot.
Step 12
Remove the dust plugs from the SFP module optical ports. Store the plugs for later use.
Caution
Do not remove the dust plugs from the SFP module port or the rubber caps from the fiber-optic
cable until you are ready to connect the cable. The plugs and caps protect the SFP module
ports and cables from contamination and ambient light.
Step 13
Clean the fiber-optic connectors by using standard procedures.
Step 14
Insert the LC cable connector into the SFP module.
Step 15
Verify that the gasket is in place and replace the Antenna end cap by using a 3/8-in. wrench to remove
the bolts, torquing the bolts to 58 to 68 inch-pounds.
Diagnosing SFP Problems
You can get statistics from the browser interface, from the CLI, or from an SNMP workstation.
Common SFP module problems fall into these categories:
•
Poor performance
•
No connectivity
•
Corrupted software
Table B-1 describes how to detect and resolve these problems.
Table B-1
Common SFP Problems
Symptom
Possible Cause
Resolution
Poor performance or
excessive errors
Cabling distance exceeded.
Reduce the cable length to within the
recommended distances.
No connectivity
Port statistics show excessive frame
check sequence (FCS),
late-collision, or alignment errors.
Incorrect or bad cable
The cable is wired incorrectly.
STP checking for possible loops.
See your SFP module documentation
for cabling guidelines.
Verify the pinouts are correct for the
proper application of cables.
Replace the cable with a tested good
cable.
Wait 30 seconds for the port LED to
turn green.
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Appendix B
Table B-1
SFP Module Replacement
Common SFP Problems (continued)
Symptom
Possible Cause
Resolution
The port is placed in
error-disabled state
after SFP module is
inserted
Bad or non-Cisco-approved SFP
module.
Remove the SFP module and replace it
with a Cisco-approved module. Use the
errdisable recovery cause
gbic-invalid global configuration
command to verify the port status, and
enter a time interval to recover from the
error-disable state.
The port is placed in
error-disabled state
after SFP is inserted
Bad or non-Cisco-approved SFP
module.
Remove the SFP module from the
switch and replace it with a
Cisco-approved module. Use the
errdisable recovery cause
gbic-invalid global configuration
command to verify the port status, and
enter a time interval to recover from the
error-disable state.
Device does not
recognize the SFP
module
The SFP module might be installed
upside down.
Verify that the SFP module is not
installed upside down.
The SFP module did not snap into
the slot.
Remove the SFP module. Inspect for
physical damage to the connector, the
module, and the module slot.
Replace the SFP module with a known
good SFP module.
Excessive errors found
in port statistics
Bad adapter in attached device or
STP checking for possible loops.
Run adapter card diagnostic utility and
wait 30 seconds for the port LED to turn
green.
Error Messages
Error Message Transceiver module inserted in port
Explanation The online insertion and removal (OIR) facility detected a newly inserted transceiver
module for the interface specified in the error message.
Error Message INIT_FAILURE: Detected for transceiver module in port, module disabled
Explanation An initialization failure occurred for the transceiver module for the interface specified
in the error message. This condition could be caused by software, firmware, or hardware problem.
As a result of the error, the module is disabled.
Recommended Action Try reseating the module. Hardware replacement should not occur first
occurrence. Before requesting hardware replacement, review troubleshooting logs with a technical
support representative.
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SFP Module Replacement
Error Message NOT_IDENTIFIED: Detected for transceiver module in %s, module disabled
Explanation The transceiver module for the interface specified in the error message could not be
identified and may not be compatible with the interface. The transceiver module specified in the
error message contains a transceiver code which could not be correctly interpreted. As a result of
the error, the module is disabled.
Recommended Action Replace the module with a compatible transceiver.
Error Message UNSUPPORTED-TRANCEIVER: Unsupported SFP transceiver found on board.
Warranty/support may void
Explanation The transceiver module for the interface specified in the error message is not a Cisco
supported module. As a result of the error, the module is disabled. When Cisco determines that a
fault or defect can be traced to the use of third-party transceivers installed by a customer or reseller,
then, at Cisco's discretion, Cisco may withhold support under warranty or a Cisco support program.
In the course of providing support for a Cisco networking product Cisco might require that the end
user install Cisco transceivers if Cisco determines that removing third-party parts will assist Cisco
in diagnosing the cause of a support issue.
Recommended Action None.
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Appendix B
SFP Module Replacement
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