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Intel® Blade Server Ethernet Switch Module IXM5414E 265
The following illustration shows the actions that occur when a port is in the discarding state.
Learning state
A port in the learning state prepares to participate in frame forwarding. The port enters the learning
state from the discarding state. A port will move from learning to forwarding when its forward delay
timer expires.
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 bridge for forwarding.
• Learns station location information from the source address of packets and adds this information
to its forwarding database.
• Receives BPDUs for the CPU and transmits BPDUs from the CPU.
The following illustration shows the actions that occur when a port is in the learning state.