Cisco Nexus 7000 Series Configuration Manual page 7

Contents
Configuring Rapid PVST+ Using Cisco NX-OS
C H A P T E R 7
Finding Feature Information
Information About Rapid PVST+
STP
90
Overview of STP 90
How a Topology is Created
Bridge ID
91
Bridge Priority Value
Extended System ID
STP MAC Address Allocation
BPDUs
93
Election of the Root Bridge
Creating the Spanning Tree Topology
Rapid PVST+
95
Overview of Rapid PVST+
Rapid PVST+ BPDUs
Proposal and Agreement Handshake
Protocol Timers
98
Port Roles 99
Rapid PVST+ Port State Overview
Blocking State
Learning State
Forwarding State
Disabled State
102
Summary of Port States
Synchronization of Port Roles
Processing Superior BPDU Information
Processing Inferior BPDU Information
Detecting Unidirectional Link Failure:Rapid PVST+
Port Cost
104
Port Priority
105
Rapid PVST+ and IEEE 802.1Q Trunks
Rapid PVST+ Interoperation with Legacy 802.1D STP
Rapid PVST+ Interoperation with 802.1s MST
Cisco Nexus 7000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.x
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