Troubleshooting

The FastHub 116C LEDs facilitate troubleshooting during ongoing operation. Table 4-1 lists the causes of common problems along with the recommended response.

Table 4-1 Problems and Recommended Responses

Symptom Possible Cause Corrective Action

Power LED does not come on Power switch off Turn on switch

Power cord not connected Plug in both ends of the power cord

Blown fuse Replace fuse; if this reoccurs, contact Cisco or your authorized reseller

Other Contact Cisco or your authorized reseller

Link LED does not come on No cable inserted Insert both ends of the cable into a device

Link LED does not come on for port 16 Tx and Rx connection reversed Exchange Tx and Rx connections

Devices not powered Ensure both devices have power

Bad cable Replace cable with a known good one

Disabled LED blinks Device at other end malfunctioning Investigate device at other end of cable from the disabled FastHub 116C port

Bad cable Replace cable with known good one

Symptom	Possible Cause	Corrective Action
Power LED does not come on	Power switch off	Turn on switch
	Power cord not connected	Plug in both ends of the power cord
	Blown fuse	Replace fuse; if this reoccurs, contact Cisco or your authorized reseller
	Other	Contact Cisco or your authorized reseller
Link LED does not come on	No cable inserted	Insert both ends of the cable into a device
Link LED does not come on for port 16	Tx and Rx connection reversed	Exchange Tx and Rx connections
	Devices not powered	Ensure both devices have power
	Bad cable	Replace cable with a known good one
Disabled LED blinks	Device at other end malfunctioning	Investigate device at other end of cable from the disabled FastHub 116C port
	Bad cable	Replace cable with known good one

Table of Contents

Troubleshooting