Cisco switch led indicators

A) SYSTEM(SYST)

Overall status of the switch.

Off: Switch is not powered on

Green: Switch is working fine

Amber: Switch is powered on but faulty

B)REDUNDANT POWER SUPPLY(RPS)

Provides backup power to the switch if the main supply goes off.

Off: No RPS available,

Green: RPS is working fine

Blinking Green: Providing backup to some other device

Amber: RPS is faulty

Flashing Amber: RPS is providing backup(primary power off)

D) DUPLEX

Duplex status of the switch ports.

Off: Switch port is half duplex

Green: Switch port is full duplex

D)STAT

Status of the switch ports.

Off: No device connected/port is administratively down.

Green: Device is connected.

Blinking green: Port is sending/receiving data.

Alternating green amber: Fault in link/Frames experiencing error

Amber: Port is blocked by Spanning Tree Protocol
E)SPEED

Speed status of the switch ports.

Off: Switch port is operating at 10Mbps

Solid green:  Switch port is operating at 100 megabits per second.

Flashing green: Switch port is operating at 1 gigabit per second.

Flashing green means 1 gigabit per second. Solid green means 100 megabits per second. And off means 10. Well we could also verify that in the operating system – show interface status. Show, right, show interface status will tell us what our speed is. We’ll also be able to look at show interface output as well.

F)PoE(Power Over Ethernet)

Some switches have a PoE LED in the system status group of LEDs. This LED indicates the per-port and system PoE status.

Connecting to the console

• Serial port – RJ45
• USB-to-Serial port adapter
• Using a terminal program, example a Putty(PuTTY is an SSH and telnet client)

Option controlling local serial lines, configuring the serial line choosing
the Speed(Baud): 9600
Data bits: 8
Stop bits: 1
Parity: none/Yes
and Flow control

We can use only console port at given time, for example if you a connect to USB console port the traditional console(RJ45 or Serial) will be disable automatically and vice-versa