Listening State - D-Link DES-3326 User Manual

24-port NWay Ethernet Switch User's Guide

Listening State

The listening state is the first transition for a port from the
blocking state.
receive BPDUs that may tell the switch that the port should not
continue to transition to the forwarding state, but should return
to the blocking state (that is, a different port is a better choice).
There is no address learning or packet forwarding from a port in
the listening state.
A port in the listening 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.
Does not add addresses to its forwarding database
Receives BPDUs and directs them to the CPU.
Processes BPDUs received from the CPU.
Receives and responds to network management messages.
Understanding and Troubleshooting the Spanning Tree Protocol
Listening is an opportunity for the switch to
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