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.