DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
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Understanding and Troubleshooting the Spanning Tree Protocol
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.