Interconnect Switch User Guide

Spanning Tree Protocol
D-2 Compaq ProLiant BL p-Class GbE Interconnect Switch User Guide
COMPAQ CONFIDENTIAL Codename: Vanilla Part Number: 263680-001 Last Saved On: 4/23/02 10:15 AM
• Does not transmit BPDUs received from the processor.
• Receives and responds to network management messages.
Figure D-1: Blocking state
Listening State
The listening state is the first transition for a port from the blocking state. Listening is an
opportunity for the switch to 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.