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- Table of Contents
-
- H3C S7502 Ethernet Switch Installation Manual-(V1.02)
- 00-1Cover
- 01-Chapter 1 Product Overview
- 02-Chapter 2 Line Processing Units
- 03-Chapter 3 Installation Preparations
- 04-Chapter 4 Hardware Installation
- 05-Chapter 5 System Commissioning
- 06-Chapter 6 Hardware Maintenance
- 07-Chapter 7 Software Maintenance
- 08-Chapter 8 Troubleshooting
- 09-Appendix A Lightning Protection
- 10-Appendix B AC Power Cables Used in Different Countries or Regions
- Related Documents
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| Title | Size | Download |
|---|---|---|
| 08-Chapter 8 Troubleshooting | 44.66 KB |
8.1 Troubleshooting Configuration System..
8.1.1 No Display on the Terminal
8.1.2 Illegible Characters on the Terminal
8.2 Troubleshooting Power Supply
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:
l The power system works normally.
l SRPU works normally.
l The console cable is connected to the Console port in the SRPU.
If no problem is found after the above check, check if:
l The serial port connected to the console cable is wrong. (The port in use is not the one set on the terminal.)
l 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
l 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 according to the correct one listed Section 8.1.1 “No Display on the Terminal” on page 8-1.
8.2 Troubleshooting Power Supply
Table 8-1 Description of power LED
|
LED |
Status |
Description |
|
OK (Green) |
ON |
The power supply works normally. |
|
OFF |
The power supply is faulty or is not installed. |
|
|
FAIL (Red) |
ON |
The power supply is faulty. |
|
OFF |
The power supply works normal or is not installed. |
If the OK LED is off, something is wrong with the system power supply. Check if:
l The power switch is turned on.
l The power cable is properly connected.
l The voltage is correct.
8.3 Troubleshooting Fans
Table 8-2 Description of fan LEDs
|
LED |
Status |
Description |
|
|
OK (Green) |
ON |
The fan works normally. |
|
|
OFF |
The fan is faulty or is not installed yet. |
||
|
FAIL (Red) |
ON |
The fan is faulty or is not installed yet. |
|
|
OFF |
The fan works normally. |
||
If the OK LED is off, check if:
l Every heat dissipation fan works normally.
l Something blocks the vent of the chassis.
l A blank panel is installed on the slot without a card.
8.4 Troubleshooting Cards
The card LEDs show the status of a card.
Table 8-3 Description of card LEDs
|
LED |
Status |
Description |
|
|
RUN (Green) |
ON/OFF |
The card is faulty or is not installed yet. |
|
|
Blinking |
The card works normally. |
||
|
ALM (Red) |
OFF |
The card is faulty or is not installed yet. |
|
|
ON |
The card works abnormally. |
||
l If the ALM LED of a card stays on, something is wrong with the card. When you reset the card, the ALM LED will turn on. After normal booting, the LED will be off.
l When resetting a card, if the ALM LED stays off, the card may be disconnected from the power supply. Check if the card is properly installed.
