ZyXEL Communications ZyXEL Dimension ES-3024 - Manual (Page 37)

Dimension ES-3024 Ethernet Switch
Hardware Connections 3-5
Table 3-2 ES-3024 Switches: LED Descriptions
LED COLOR STATUS DESCRIPTION
SYS Green Blinking
ON
OFF
The system is rebooting and performing self-diagnostic tests.
The system is on and functioning properly.
The power is off or the system is not ready/malfunctioning.
ALM Red ON
OFF
There is a hardware failure.
The system is functioning normally.
LNK/ACT
(Ethernet ports)
Green Blinking
ON
OFF
The system is transmitting/receiving to/from a 10 Mbps Ethernet network.
The link to a 10 Mbps Ethernet network is up.
The link to a 10 Mbps Ethernet network is down.
Yellow Blinking
ON
OFF
The system is transmitting/receiving to/from a 100 Mbps Ethernet network.
The link to a 100 Mbps Ethernet network is up.
The link to a 100 Mbps Ethernet network is down.
Blinking The Ethernet port is negotiating in half-duplex mode and collisions are
occurring; the more collisions that occur the faster the LED blinks.
ON The Ethernet port is negotiating in full-duplex mode.
FDX/COL
(Ethernet ports)
Yellow
OFF The Ethernet port is negotiating in half-duplex mode and no collisions are
occurring.
3.5 Stacking Scenario Examples
Use Ethernet cables when stacking the switches. See the following figures for example stacking scenarios using the
stacking module. The switches must form a closed ring in all scenarios.
Figure 3-6 Stacking Example 1