Learning State - Cisco WS-C6506 Software Manual

Understanding How Spanning Tree Protocols Work

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 performs as follows:
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Figure 7-5
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
7-10
Figure 7-5
Discards frames that are received from the attached segment.
Discards frames that are switched from another port for forwarding.
Incorporates station location into its address database.
Receives BPDUs and directs them to the system module.
Receives, processes, and transmits BPDUs that are received from the system module.
Receives and responds to network management messages.
Port 2 in Learning State
All segment
frames
Port 1
Station
addresses
BPDUs
Filtering System
database module
Station
addresses BPDUs
Data
frames
Port 2
Learning
BPDU and network
management frames
shows a port in the learning state.
Forwarding
Network
management
and data frames
Frame
forwarding
Network
management
frames
All segment
frames
Chapter 7 Configuring Spanning Tree
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