Cisco Systems N3KC3064TFAL3 manual Protocol Timers Port Roles Port States, Information About MST

Contents

C H A P T E R 9

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

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)

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