Nexthop NH-3730-24F, Руководство по установке оборудования

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NH-3730-24F Hardware Installation Manual
Chapter 4 Hardware Troubleshooting
4.1 Trouble analyzing
The key to troubleshooting is to separate trouble from the system. By analyzing what
system should do and what system is doing, troubleshooting becomes easy. Think of
the following systems while analyzing troubles:
z
Power and cooling system—Power and cooling fan;
z
Ports, cables and connections—ports on the front panel of the switch and cables
connected to the ports.
4.1.1 Power and cooling system breakdown
Examine the following conditions to separate troubles:
z
The power is “ON”. Make sure the cooling fan is working normally. If cooling fan is
not working normally, check the fan;
z
Examine the environment. The switch cannot be overheated. Make sue the inhale
and exhale hole of the switch is clean. Refer to “General Requirement for Working
Environment”. The temperature of the switch working environment is 0-40
℃
(32-104
º
F ).
z
If switch is not working and “PWR” indicator is not light, check the power supply.
4.1.2 Ports, cables and connections breakdown
To separate problems, check the follow status:
z
If switch port is unable to link, check the connection. Make sure the connection is
normal;
z
If the power is “ON”, check the power supply and power cord;
z
If the system is working but the console port is not, make sure the console port
configurations are as follows: 9600 baud rate, 8-bit data bit, no parity bit, 1 stop bit
and no flow control.
4.2 LEDs
LEDs indicates what switches are doing. NH-3730-24F switch LED and functions are
as follows:
NO. Name Description Note
1 PWR Power indicator lights Switch on and indicator lights.
2 SYS System Indicator
Indicator lights when the system is turning
on. Indicator blinks when the system is
functioning.
3 LINK/ACT
Indicator for corresponding
port.
Indicator lights when link status is normal.
Indicator blinks when data is being sent or
received
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