Forwarding State - Cisco 7609 Configuration Manual

Cisco ios software configuration guide—12.1e

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Table of Contents

Configuring STP and IEEE 802.1s MST

Forwarding State

A Layer 2 LAN port in the forwarding state forwards frames, as shown in

port enters the forwarding state from the learning state.

Figure 15-6 Interface 2 in Forwarding State

A Layer 2 LAN port in the forwarding state performs as follows:

Forwards frames received from the attached segment.

Forwards frames switched from another port for forwarding.

Incorporates end station location information into its address database.

Receives BPDUs and directs them to the system module.

Processes BPDUs received from the system module.

Receives and responds to network management messages.

and data frames

and data frames

Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E

Understanding How STP Works

15-6. The Layer 2 LAN