Cisco Nexus 6000 Series - Page 5

Verifying the Private VLAN Configuration 42
CHAPTER 5 Configuring Rapid PVST+ 43
Information About Rapid PVST+ 43
Understanding STP 43
STP Overview 43
Understanding How a Topology is Created 44
Understanding the Bridge ID 44
Bridge Priority Value 44
Extended System ID 45
STP MAC Address Allocation 45
Understanding BPDUs 46
Election of the Root Bridge 47
Creating the Spanning Tree Topology 47
Understanding Rapid PVST+ 48
Rapid PVST+ Overview 48
Rapid PVST+ BPDUs 49
Proposal and Agreement Handshake 50
Protocol Timers 51
Port Roles 51
Port States 52
Rapid PVST+ Port State Overview 52
Blocking State 53
Learning State 53
Forwarding State 53
Disabled State 54
Summary of Port States 54
Synchronization of Port Roles 54
Processing Superior BPDU Information 55
Processing Inferior BPDU Information 56
Spanning-Tree Dispute Mechanism 56
Port Cost 56
Port Priority 57
Rapid PVST+ and IEEE 802.1Q Trunks 57
Rapid PVST+ Interoperation with Legacy 802.1D STP 57
Cisco Nexus 6000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
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