user manual

Table Of Contents
Protocol Timers 71
Port Roles 71
Port States 72
Rapid PVST+ Port State Overview 72
Blocking State 73
Learning State 73
Forwarding State 73
Disabled State 74
Summary of Port States 74
Synchronization of Port Roles 74
Processing Superior BPDU Information 75
Processing Inferior BPDU Information 76
Spanning-Tree Dispute Mechanism 76
Port Cost 76
Port Priority 77
Rapid PVST+ and IEEE 802.1Q Trunks 77
Rapid PVST+ Interoperation with Legacy 802.1D STP 77
Rapid PVST+ Interoperation with 802.1s MST 78
Configuring Rapid PVST+ 78
Enabling Rapid PVST+ 78
Enabling Rapid PVST+ per VLAN 79
Configuring the Root Bridge ID 80
Configuring a Secondary Root Bridge 81
Configuring the Rapid PVST+ Port Priority 82
Configuring the Rapid PVST+ Pathcost Method and Port Cost 83
Configuring the Rapid PVST+ Bridge Priority of a VLAN 83
Configuring the Rapid PVST+ Hello Time for a VLAN 84
Configuring the Rapid PVST+ Forward Delay Time for a VLAN 85
Configuring the Rapid PVST+ Maximum Age Time for a VLAN 85
Specifying the Link Type 85
Restarting the Protocol 86
Verifying Rapid PVST+ Configurations 86
CHAPTER 9
Configuring Multiple Spanning Tree 89
Information About MST 89
Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)
OL-26590-01 vii
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