I have an RB5009. Ethernet ports have 2 LED. Only the left one is solid when there is a connection and flashes when there is traffic on the port (always green regardless of speed 100Mb or 1Gb).
The right LED is always off and I've never seen it light up. Do you know what's the right LED supposed to mean?
Other routers/switches I ve dealt with, the left LED status would indicate connection and colour would indicate speed (green or amber). The right would indicate activity. With POE ones, the right would indicate POE status if the router/switch is powering the device.