Appendix B SFP Module Replacement

Step 9 Find the send (TX) and receive (RX) markings that identify the top side of the replacement SFP module.

Note 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).

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-1describes how to detect and resolve these problems.

 

 

Table B-1

Common SFP Problems

 

 

 

 

 

 

 

 

 

 

 

 

Symptom

 

Possible Cause

Resolution

 

 

 

 

 

 

 

Poor performance or

Cabling distance exceeded.

Reduce the cable length to within the

 

 

excessive errors

 

Port statistics show excessive frame

recommended distances.

 

 

 

 

 

 

 

 

 

 

 

 

check sequence (FCS),

See your SFP module documentation

 

 

 

 

late-collision, or alignment errors.

for cabling guidelines.

 

 

 

 

 

 

 

 

No connectivity

 

Incorrect or bad cable

Verify the pinouts are correct for the

 

 

 

 

The cable is wired incorrectly.

proper application of cables.

 

 

 

 

 

 

 

 

 

 

 

 

STP checking for possible loops.

Replace the cable with a tested good

 

 

 

 

cable.

 

 

 

 

 

 

 

 

 

 

Wait 30 seconds for the port LED to

 

 

 

 

 

turn green.

 

 

 

 

 

 

 

 

 

 

 

 

 

Cisco 3200 Series Router Hardware Reference

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL-5816-10

 

 

 

 

B-3

 

 

 

 

 

 

 

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Cisco Systems 3200 manual Diagnosing SFP Problems, Symptom Possible Cause Resolution

3200 specifications

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