The IntelliShun port lights are an indicator of speed and connectivity. For a description of the port lights refer to the following diagram:
__RJ-45__
| |
| |
| |
|0--------0|
^ ^
Left Right
_________________________________________
| Left | Right | Speed |
|----------|----------|----------|
| Green | Blank = 10Mb |
| Green | Green = 100Mb |
| Green | Orange = 1Gbps |
| Orange | Blank = bypass |
| Blank | Blank = no link |
|--------------------------------|
Ideally, both ports should show the same lights at all times. If not, then the connected devices (edge router, firewall, switch, etc) are mismatched, and serious malfunctions are imminent.