Port auto-negotiation

When a link LED does not light (indicating loss of link between two devices), the most common reason is a failure of port auto-negotiation between the connecting ports. If a link LED fails to light when you connect the switch to a port on another device, do the following:

  1. Ensure that the switch port and the port on the attached end-node are both set to Auto mode.
  2. If the attached end-node does not have an Auto mode setting, you must manually configure the switch port to the same setting as the end-node port.