Forwarding State - Cisco WS-C2950SX-48-SI Configuration Manual

Chapter 7 Configuring Spanning Tree
Figure 7-5
A port in the learning state performs as follows:
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Forwarding State

A port in the forwarding state forwards frames, as shown in
state from the learning state.
78-15486-01
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 & network
management frames
Discards frames received from the attached segment
Discards frames 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 received from the system module
Receives and responds to network management messages
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
Forwarding
Network
management
& data frames
Frame
forwarding
Network
management
frames
All segment
frames
Understanding How STPs Work
Figure 7-6. The port enters the forwarding
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Release 8.1
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