H3C S7502 Ethernet Switch Installation Manual

Installation Manual
H3C S7502 Ethernet Switch Chapter 8 Troubleshooting
8-1
Chapter 8 Troubleshooting
Although the S7502 has 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 S7502, you can find the status LEDs of LPU, power module, and
fan. You can check these status LEDs to locate the faults.
8.1 Troubleshooting Configuration System
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.
8.1.1 No Display on the Terminal
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 in 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 check: None
–Stop bits: 1
–Flow control: None
–Terminal emulation mode: VT100
z Something is wrong with the console cable.
8.1.2 Illegible Characters on the Terminal
If the configuration terminal displays illegible characters, the configuration of
parameters on the terminal might be incorrect. In this case, check the configuration