D-Link DGS-3308FG Product Manual - Page 224

8-port Gigabit Ethernet Switch User's Guide Learning State A port in the learning state prepares to participate in frame forwarding. The port enters the learning state from the listening state. A port in the learning state does the following: • Discards frames received from the network segment to which it is attached. • Discards packets sent from another port on the switch for forwarding. • Adds addresses to its forwarding database. • Receives BPDUs and directs them to the CPU. • Processes and transmits BPDUs received from the CPU. • Receives and responds to network management messages. Forwarding State A port in the forwarding state forwards packets. The port enters the forwarding state from the learning state when the forward delay timer expires. 214