3com 10005622 User Manual

After the system has successfully completed the 
power-up diagnostics, check the items in Table 4-1 to 
verify that the system is operating correctly. If you 
discover abnormal conditions, see Chapter 6.

Your Switch 3900 system is shipped from the factory 
with the software installed and IEEE 802.1d bridging 
disabled. To configure your system for your particular 
networking environment (including customized 
filtering and setting up SNMP), you must first 
establish management access. See Chapter 5.

Table 4-1   System Power-Up Checklist 

Power-up 
error messages

If there is a problem during power-up, the 
messages are displayed in the Administration 
Console connection through the Console port.

Normal LED 
activity

When the power-up diagnostics are running, 
the LEDs light in a certain pattern as described in 
the “Power-up Diagnostics” section. After you 
properly cable the system and the system 
successfully completes the power-up diagnostics, 
look for the following normal LED activity:

Power LED = Green

Fault LED = Not lit

Pckt status LED = Yellow 

Stat status LED = Green

If an LED does not light or shows a color different 
from the one indicated here, see Chapter 6 for 
information about the cause of the problem.