Users Guide

Contents 27
22 Spanning Tree Protocol. . . . . . . . . . . . . 845
STP Overview . . . . . . . . . . . . . . . . . . . . . . 845
What Are Classic STP, Multiple STP, and
Rapid STP?
. . . . . . . . . . . . . . . . . . . . . 845
How Does STP Work?
. . . . . . . . . . . . . . . 846
How Does MSTP Operate in the Network?
. . . . 847
MSTP with Multiple Forwarding Paths
. . . . . . . 851
MSTP and VLAN IDs
. . . . . . . . . . . . . . . . 852
What are the Optional STP Features?
. . . . . . . 852
RSTP-PV
. . . . . . . . . . . . . . . . . . . . . . . . . 854
DirectLink Rapid Convergence
. . . . . . . . . . . 856
IndirectLink Rapid Convergence Feature
. . . . . 858
Interoperability Between STP-PV and RSTP-PV
Modes. . . . . . . . . . . . . . . . . . . . . . . . 860
Interoperability With IEEE Spanning Tree
Protocols
. . . . . . . . . . . . . . . . . . . . . . 860
Configuration Examples
. . . . . . . . . . . . . . 865
Default STP Values
. . . . . . . . . . . . . . . . . . . 866
Configuring Spanning Tree (Web)
. . . . . . . . . . . . 867
STP Global Settings
. . . . . . . . . . . . . . . . . 867
STP Port Settings
. . . . . . . . . . . . . . . . . . 869
STP LAG Settings
. . . . . . . . . . . . . . . . . . 871
Rapid Spanning Tree
. . . . . . . . . . . . . . . . 872
MSTP Settings
. . . . . . . . . . . . . . . . . . . 874
MSTP Interface Settings
. . . . . . . . . . . . . . 876
PVST/RPVST Global Configuration
. . . . . . . . . 877
PVST/RPVST VLAN Configuration
. . . . . . . . . 878
PVST/RPVST Interface Configuration
. . . . . . . 880
PVST/RPVST Statistics
. . . . . . . . . . . . . . . 881
Configuring Spanning Tree (CLI)
. . . . . . . . . . . . 882
Configuring Global STP Bridge Settings
. . . . . . 882