Differentiate indicator lights in Cisco Switch
As an employee of a company with Cisco's large, multi-switch network, every time I see the Switch's flashing lights like a music player's light, they look attractive and attractive, but whether Do you know what message they convey?
As an employee of a company with Cisco's large, multi-switch network, every time I see the Switch's flashing lights like a music player's light, they look attractive and attractive, but whether Do you know what message they convey?
So what exactly are these lights for, what does the principle work, and how does it work?This article will answer questions for you.
Like other electronic devices, the Switch also has indicator lights so that users can know its status.The switch consists of 4 lights in the front:
- System light - System Led
- Remote power supply light - Remote Power Supply Led (RPS)
- Signal light mode - Port Mode Led
- Port status lights - Port status Led
System light - System Led
The system light informs whether the system is powered and is functioning properly.Each time the power cord is plugged in, the Switch will start the hardware testing process.During this process, the system light will not light up.Then, if the test is successful, the light will indicate green.Conversely, when there is an error the lamp will be orange.Unfortunately, when the lights are orange, this means you have to take the device for warranty.
External light source - RPS
External power lights indicate whether the switch is powered from outside or not.This light is only lit when the switch is powered from outside.
Signal mode light and port status light
Signal mode indicator light has 4 modes (STAT, UTL, FDUP, SPEED), you can select modes by clicking on the "Mode" key, described in the following figure:
For each signaling mode, the display role of the port status lights will correspond according to the following table:
Signal light mode
Port status light
Explain
STAT
Turn off
The corresponding port has no connection
Green consecutively
Starting connection
Blueflashing
The port is exchanging data
Blue/orangeflashing
Connection failed
Orange continuously
The port is locked
UTL
Turn off
Each port status light when turned off will indicate that the Switch uses bandwidth to halve.The lights will turn off in order from right to left.If the rightmost light is off, the Switch is using less than 50% of the total bandwidth.If the next light is off, the Switch is using less than 25% of the total bandwidth .
Green
If all the lights are green, the Switch is using more than 50% of the total bandwidth
FDUP
Turn off
Port is running in half-duplex mode (half-duplex)
Green
Port running in full-duplex mode
Speed
Turn off
Port running at 10Mbps speed
Green
Port running at 100Mbps speed
Update 26 May 2019
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