3com S7906E Guide D’Installation Rapide

 

7-1 

Although the S7900E series have passed the comprehensive and strict test before delivery, faults may 

occur due to improper installation. This chapter describes how to handle faults caused by improper 

installation.  

On the SRPU of the S7900E series, you can find the status LEDs of LPUs, power modules, and fans. 

You can check these status LEDs to locate faults. 

 

The LEDs on the standby SRPU of the S7900E series are always OFF except the SRPU LED. The 

SRPU LED on the standby SRPU is in the same state as that on the active SRPU. Thus, you need not 

consider the LEDs on the standby SRPU when troubleshooting power modules, fans, or LPUs.  

 

After the switch is powered on and the system is normal, the booting information will be displayed on the 

configuration terminal. If the configuration system has failed, the configuration terminal may display 

illegible characters or nothing at all. 

After the switch is powered on, if no information is displayed on the terminal, check if: 

z 

The power system works normally. 

z 

SRPU works normally. 

z 

The console cable is connected to the console port of the SRPU. 

If no problem is found after the above check, check if:  

z 

The serial port connected to the console cable is wrong. (The port in use is not the one set on the 

terminal.) 

z 

The configuration of parameters on the terminal is wrong.  

Correct parameter configuration is listed as follows:  

–Bits per second: 9600 

–Data bits: 8 

–Parity: None 

–Stop bits: 1 

–Flow control: None 

–Terminal emulation mode: VT100 

z 

Something is wrong with the console cable.