3Com 3 4

4PROBLEM SOLVING

This chapter helps you to diagnose and solve problems you may have

with the operation of your Switch. There is also an explanation of IP

addressing.

The topics covered are:

■Solving Problems Indicated by LEDs

■Solving Hardware Problems

■Solving Communication Problems

■Solving Software Upgrade Problems

If you experience a problem that is not listed here, it may be included in

the support section of the SuperStack 3 Switch Management Interface

Reference Guide on the CD-ROM that accompanies your Switch.

For Technical Support information, see Appendix D.

DUA1730-0AAA03.book Page 53 Thursday, November 17, 2005 12:17 PM

Contents

Main 3Com Corporation 350 Campus Drive Marlborough, MA 01752-3064 C ABOUT THIS GUIDE 1 SUPERSTACK 3 SWITCH 4200 FAMILY 2 3 4 A B C D Page ABOUT THIS GUIDE Conventions Tabl e 1 Notice Icons Tabl e 2 Text Conventions Related Documentation Page 1 SUPERSTACK 3 SWITCH 4200 F About the Switch 4200 Family About the Switch 4200 Series 13 Switch 4200 Family Front View Detail 25/Up 26/Down 5 197 Page Page Switch 4200 Family Rear View Detail Default Settings Page 2 Package Contents Choosing a Suitable Site Rack-mounting Page Placing Units On Top of Each Other 23 Placing Units On Top of Each Other Stacking Units Figure 6 Stacking example The Power-up Sequence SFP Operation Page Choosing the Correct Cables Page Page Page 3 32 CHAPTER 3: SETTING UP FOR MANAGEMENT Setting Up Overview Configure IP information manually for your Switch or view the automatically configured IP information Prepare for your chosen method of management Figure8 Initial Switch Setup and Mana gement Flow diagram Page Page Manually Configuring IP Information Page Page Page Page Page Page Viewing Automatically Configured IP Information Page Page Methods of Managing a Switch Page Setting Up Command Line Interface Setting Up Web Interface Management Setting Up SNMP Default Users and Passwords Page Page 4 Solving Problems Indicated by LEDs Solving Hardwa re Problems Solving Communication Problems Solving Stack Formation Problems Solving Software Upgrade Problems A Important Safety Information Page Linformation de Scurit Importante Page Wichtige Sicherheitsinformationen Page Informacin de seguridad importante Page Importanti informazioni di sicurezza Page Page B Null Modem Cable PC-AT Serial Cable Modem Cable RJ-45 Pin Assignments Tabl e 10 Pin assignments Pin assignments for ports configured as MDI and MDIX are given in Tabl e 10 and Tab le 11. Tabl e 11 Pin assignments Page C Switch 4200 26-Port (3C17300A) Switch 4200 50-Port (3C17302A) Switch 4200 28-Port (3C17304A) Page D P Register Your Product Purchase Value-Added Services Troubleshoot Online Access Software Downloads Telephone Technical Support and Repair Contact Us Page I Numbers A B C R S T U W REGULATORY NOTICES FCC S CSA S VCCI S