3com 3CDSG8 사용자 가이드

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Troubleshooting 

 
 
 
 
 
 

This section describes problems that may arise when installing the and how to resolve these 
issue. This section includes the following topics: 

•  Problem Management — Provides information about problem management. 
•  Troubleshooting Solutions — Provides a list of troubleshooting issues and solutions 

for using the device. 

 

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Problem management includes isolating problems, quantifying the problems, and then applying 
the solution. When a problem is detected, the exact nature of the problem must be determined. 
This includes how the problem is detected, and what are the possible causes of the problem. 
With the problem known, the effect of the problem is recorded with all known results from the 
problem. Once the problem is quantified, the solution is applied. Solutions are found either in 
this chapter, or through customer support. If no solution is found in this chapter, contact 
Customer Support. 

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Listed below are some possible troubleshooting problems and solutions. These error messages 
include: 
 

•  Cannot connect to management using RS-232 serial connection 
•  Cannot connect to switch management using HTTP, SNMP, etc. 
•  Self-test exceeds 15 seconds 
•  No connection is established and the port LED is on 
•  Device is in a reboot loop 
•  No connection and the port LED is off 
•  Lost Password.