Hardware Installation and Connection
Switch Hardware Features
The following table describes the hardware features of the Switch by model.
 
GS2220 Series Comparison Table 
feature
gs2220-10
gs2220-10hp
gs2220-28
gs2220-28hp
gs2220-50
gs2220-50hp
10/100/1000 Mbps Ethernet ports
8
0
24
0
44
0
10/100/1000 Mbps PoE ports
0
8
0
24
0
48
GbE combo ports (dual personality interfaces)
2
2
4
4
4
4
1 Gbps SFP interfaces
0
0
0
0
2
2
Fan
0
1
0
2
1
2
Rubber feet for desktop placement
Yes
Yes
Yes
Yes
Yes
Yes
Wall-mount
Yes
Yes
No
No
No
No
Rack-mount
Yes
Yes
Yes
Yes
Yes
Yes
Gigabit Ethernet Ports
An auto-crossover (auto-MDI/MDI-X) port automatically works with a straight-through or crossover Ethernet cable.
When auto-negotiation is turned on, an Ethernet port negotiates with the peer automatically to determine the connection speed and duplex mode. If the peer Ethernet port does not support auto-negotiation or turns off this feature, the Switch determines the connection speed by detecting the signal on the cable and using half duplex mode. When the Switch’s auto-negotiation is turned off, an Ethernet port uses the pre-configured speed and duplex mode when making a connection, thereby requiring you to make sure that the settings of the peer Ethernet port are the same in order to connect.
Default Ethernet Negotiation Settings
The factory default negotiation settings for the Gigabit ports on the Switch are:
• Speed: Auto
• Duplex: Auto
• Flow control: Off
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.
 
LED Descriptions 
LED
Color
Status
Description
PWR
Green
On
The Switch is receiving power from the power module in the power slot.
Blinking
The Switch is returning to the last-saved custom default configuration settings.
Amber
On
The Switch is returning to its factory default configuration settings.
 
Off
The Switch is not receiving power from the power module in the power slot.
SYS
Green
On
The Switch is on and functioning properly.
Blinking
The Switch is rebooting and performing self-diagnostic tests.
Red
On
The Switch is functioning abnormally.
 
Off
The power is off or the Switch is not ready or malfunctioning.
CLOUD
Green
On
The Switch has successfully connected to the NCC (Nebula Control Center).
Blinking
The Switch cannot connect to the NCC because it is not registered.
Amber
On
The Switch is registered at NCC but cannot connect to the NCC. Please check the Internet connection of the Switch.
Blinking
The Switch is not registered at NCC and cannot connect to the NCC. Please check the Internet connection of the Switch and register the Switch at NCC.
 
Off
The Switch is operating in standalone mode. Nebula Control Center Discovery is disabled in SYSTEM > Cloud Management in the Switch’s Web Configurator.
LOCATOR
Blue
On
The Switch is uploading firmware. While the Switch is doing this, do NOT turn off the power.
Blinking
Shows the actual location of the Switch between several devices in a rack. The default timer is 30 minutes when you are configuring the Switch.
 
Off
The locator is not functioning or malfunctioning.
PoE Usage MAX
Bar1 is the bar at the bottom; bar 5 is the bar at the top.
Green
(Bar1 – Bar3)
On
Each bar represents 20 percent of PoE Power consumption.
Bar 1: PoE power usage is below 20 percent of the power supplied budget.
Bar 2: PoE power usage is below 40 percent of the power supplied budget, but over 20 percent of the power supplied budget.
Bar 3: PoE power usage is below 60 percent of the power supplied budget, but over 40 percent of the power supplied budget.
Yellow
(Bar4)
On
PoE power usage is below 80 percent of the power supplied budget, but over 60 percent of the power supplied budget.
Red
(Bar5)
On
PoE power usage is more than 80 percent of the power supplied budget.
Blinking
Less than 5 percent of the power supplied budget remains. 5 percent is the default value.
 
Off
PoE power usage is 0 percent of power supplied budget.
PoE MAX
(GS2220-28HP and GS2220-50HP)
Amber
On
Less than five percent of the power supplied budget remains. Five percent is the default value.
 
Off
The Switch has a sufficient power supplied budget.
Ethernet Ports and PoE
LNK/ACT
Green
Blinking
The Switch is transmitting or receiving to or from a 1000 Mbps Ethernet network.
On
The link to a 1000 Mbps Ethernet network is up.
Amber
Blinking
The Switch is transmitting or receiving to or from a 10 Mbps or a 100 Mbps Ethernet network.
On
The link to a 10 Mbps or a 100 Mbps Ethernet network is up.
 
Off
The link to an Ethernet network is down.
PoE Mode
(GS2220-10HP, GS2220-28HP and GS2220-50HP)
Green
On
Power supplied to all PoE Ethernet ports meets the IEEE 802.3at standard.
Amber
On
Power supplied to all PoE Ethernet ports meets the IEEE 802.3af standard.
 
Off
There is no power supplied.
SFP Slots
LINK/ACT
Green
On
The uplink port is linking at 1000 Mbps.
Blinking
The Switch is transmitting or receiving data at 1000 Mbps.
Amber
On
The uplink port is linking at 100 Mbps.
Blinking
The Switch is transmitting or receiving data at 100 Mbps.
 
Off
There is no link or port, or the uplink port is shut down.