Руководство Пользователя для 3com 2948-SFP Plus

This section describes problems that may arise when installing the 
switch and how to resolve these issues. 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.

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 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.

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

  Switch does not run; power lED is off.

  Cannot connect to management using Console 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.