Cisco Systems CGS 2520 manual Troubleshooting

Contents

C H A P T E R 4	Troubleshooting 4-1
	Diagnosing Problems	4-1
	Switch POST Results		4-1
	Switch LEDs 4-1
	Switch Connections		4-2
	Bad or Damaged Cable			4-2
	Ethernet and Fiber-Optic Cables				4-2
	Link Status	4-2
	10/100 and 10/100/1000 Port Connections 4-3
	10/100 PoE+ Port Connections				4-3
	SFP Module	4-3
	Interface Settings		4-4
	Ping End Device		4-4
	Spanning Tree Loops			4-4
	Switch Performance		4-4
	Speed, Duplex, and Auto-Negotiation4-4
	Auto-Negotiation and Network Interface Cards 4-5
	Cabling Distance		4-5

		Resetting the Switch to the Factory Default Settings 4-6
		Finding the Switch Serial Number		4-6
		Technical Specifications
A P P E N D I X	A		A-1
		Switch Specifications A-1
		Power Supply Module Specifications		A-4
		Connector and Cable Specifications
A P P E N D I X	B			B-1
		Connector Specifications	B-1
		10/100 Ethernet Ports	B-1
		SFP Module Connectors B-2
		Dual-Purpose Ports	B-3
		Alarm Port B-3

Alarm Ratings	B-3
Cables and Adapters	B-4
SFP Module Cables B-4
Cable Pinouts	B-6

Console Port Adapter Pinouts B-8

Cisco CGS 2520 Hardware Installation Guide

OL-31444-01 v