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42C4911, January 2007 117
CHAPTER 6
Rapid Spanning Tree Protocol/Multiple
Spanning Tree Protocol
IEEE 802.1w Rapid Spanning Tree Protocol enhances the Spanning Tree Protocol to provide
rapid convergence on Spanning Tree Group 1. IEEE 802.1s Multiple Spanning Tree Protocol
extends the Rapid Spanning Tree Protocol, to provide both rapid convergence and load balanc-
ing in a VLAN environment.
The following topics are discussed in this chapter:
“Rapid Spanning Tree Protocol” on page 118
“Port State Changes” on page 118
“Port Type and Link Type” on page 119
“RSTP Configuration Guidelines” on page 119
“RSTP Configuration Example” on page 120
“Multiple Spanning Tree Protocol” on page 121
“MSTP Region” on page 121
“Common Internal Spanning Tree” on page 121
“MSTP Configuration Guidelines” on page 122
“MSTP Configuration Example” on page 122