Listening State; Learning State; Forwarding State - Cisco Catalyst 3560-X Software Configuration Manual
Hide thumbs
Also See for Catalyst 3560-X:
- Command reference manual (1188 pages) ,
- Software configuration manual (1438 pages) ,
- Manual (276 pages)
Table of Contents
Advertisement
Chapter 1
Configuring STP
there is only one switch in the network, no exchange occurs, the forward-delay timer expires, and the
interface moves to the listening state. An interface always enters the blocking state after switch
initialization.
An interface in the blocking state performs these functions:
•
•
•
•
Listening State
The listening state is the first state a Layer 2 interface enters after the blocking state. The interface enters
this state when the spanning tree decides that the interface should participate in frame forwarding.
An interface in the listening state performs these functions:
•
•
•
•
Learning State
A Layer 2 interface in the learning state prepares to participate in frame forwarding. The interface enters
the learning state from the listening state.
An interface in the learning state performs these functions:
•
•
•
•
Forwarding State
A Layer 2 interface in the forwarding state forwards frames. The interface enters the forwarding state
from the learning state.
An interface in the forwarding state performs these functions:
•
•
•
•
OL-25303-03
Discards frames received on the interface
Discards frames switched from another interface for forwarding
Does not learn addresses
Receives BPDUs
Discards frames received on the interface
Discards frames switched from another interface for forwarding
Does not learn addresses
Receives BPDUs
Discards frames received on the interface
Discards frames switched from another interface for forwarding
Learns addresses
Receives BPDUs
Receives and forwards frames received on the interface
Forwards frames switched from another interface
Learns addresses
Receives BPDUs
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Understanding Spanning-Tree Features
1-7
Advertisement
Table of Contents
Troubleshooting
