Chapter 3 Hardware Overview
MGS3520 Series User’s Guide
33
3.2 LEDs
After you connect the power to the Switch, view the LEDs to ensure proper functioning of the
Switch and as an aid in troubleshooting.
Table 3
LED Descriptions
LED
COLOR
STATUS
DESCRIPTION
PWR
Green
On
The system is turned on.
Off
The system is off.
SYS
Green
On
The system is on and functioning properly.
Blinking
The system is rebooting and performing self-diagnostic tests.
Off
The power is off or the system is not ready/malfunctioning.
ALM
Red
On
A hardware failure is detected, or an external alarm is active.
Off
The system is functioning normally.
10/100/1000 Mbps Gigabit Ethernet Ports (MGS3520-28 & MGS3520-50)
1 ~ 24
1 ~ 44
Green
Blinking
The system is transmitting/receiving to/from a 10 Mbps or 1000 Mbps
Ethernet network.
on
The link to a 10 Mbps or 1000 Mbps Ethernet network is up.
Amber
Blinking
The system is transmitting/receiving to/from a 100 Mbps Ethernet
network.
On
The link to a 100 Mbps Ethernet network is up.
Off
The link to an Ethernet network is down.
100/1000 Mbps SFP Slots (MGS3520-28F)
1 ~ 24
Green
On
The port has a successful 1000 Mbps connection.
Blinking
The port is receiving or transmitting data at 1000 Mbps.
Amber
On
The port has a successfule 100 Mbps connection.
Blinking
This port is receiving or transmitting data at 100 Mbps.
Off
This link is disconnected.
1000Base-T Ethernet Ports (in Dual Personality Interface)
LNK/ACT
Green
Blinking
The system is transmitting/receiving to/from a 10 Mbps or a 1000 Mbps
Ethernet network.
On
The link to a 10 Mbps or a 1000 Mbps Ethernet network is up.
Amber
Blinking
The system is transmitting/receiving to/from a 100 Mbps Ethernet
network.
On
The link to a 100 Mbps Ethernet network is up.
Off
The link to an Ethernet network is down.
FDX
Amber
On
The Gigabit port is negotiating in full-duplex mode.
Off
The Gigabit port is negotiating in half-duplex mode.