Cisco Systems 3200 User Manual

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).

Align the SFP module in front of the slot opening.

Insert the SFP module into the slot until you feel the connector on the module snap into place in the back 
of the slot.

Remove the dust plugs from the SFP module optical ports. Store the plugs for later use.

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. 

Clean the fiber-optic connectors by using standard procedures.

Insert the LC cable connector into the SFP module.

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.

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

 describes how to detect and resolve these problems.

Cabling distance exceeded.

Port statistics show excessive frame 
check sequence (FCS), 
late-collision, or alignment errors.

Reduce the cable length to within the 
recommended distances. 

See your SFP module documentation 
for cabling guidelines.

Incorrect or bad cable

The cable is wired incorrectly.

STP checking for possible loops.

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.