RJ45 Ethernet Connector Port LEDs

Each RJ45 Ethernet port has two LEDs. The left LED is green and lights to show that a link has been established. It blinks off randomly whenever there is network activity on that port.

On the RJ-45 connectors, the right LED is bi-color (amber and green) and indicates the speed of connection by the color it displays. When the port is operating at 100 megabits per second, the right LED displays one color. When operating at 1000 megabits per second, it displays the other color. When operating at 10 megabits per second, the right LED is off. The green/amber color scheme varies from one server blade to another. The following table provides a chart for interpreting the link-speed relationships.

Table 4 Link-Speed LED Colors for Each Server Blade

When an Ethernet port is connected to an x86 server blade (server blades with a model number that starts with X) that has been put in Wake-on-LAN (WOL) mode, the Link LED indicates when the system is in standby mode. It does this by blinking in a repeating, non-random pattern. It flashes ON for 0.1 second and OFF for 2.9 seconds. In standby mode, the system is functioning at a minimal level and is ready to resume full activity.