Cisco Systems ME 2400 manual Symptom Possible Cause Resolution

Chapter 3 Troubleshooting

Diagnosing Problems

Table 3-1describes how to detect and resolve these problems.

Table 3-1 Common Problems and Their Solutions

Symptom	Possible Cause	Resolution
Poor performance or excessive	Duplex autonegotiation mismatch.	See the switch software
errors		configuration guide for
		information on identifying
		autonegotiation mismatches.
	Cabling distance exceeded
	• Port statistics show excessive	• See the switch software
	frame check sequence (FCS),	configuration guide for
	late-collision, or alignment	information on displaying
	errors.	port statistics.
	• For 10/100BASE-TX
	connections:
	– The distance between the	• Reduce the cable length to
	port and the attached device	within the recommended
	exceeds 328 feet (100	distances.
	meters).
	– If the switch is attached to a	• See your repeater
	repeater, the total distance	documentation for cabling
	between the two end	guidelines.
	stations exceeds the cabling
	guidelines.
	• For SFP module port	• See your SFP module
	connections:	documentation for cabling
	– The distance between the	guidelines.
	SFP module port and the
	attached device exceeds the
	SFP module cabling
	guidelines.

Cisco ME 2400 Ethernet Access Switch Hardware Installation Guide

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