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Per-VLAN Spanning Tree (PVST) and Per-VLAN Spanning Tree Plus (PVST+)

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The type of a single instance Spanning Tree Protocol (STP) is known as Common Spanning Tree (CST).

Delay in receiving BPDUs is common  in large switched Common Spanning Tree (CST) networks. The delay in receiving BPDUs can cause problems like convergence time problems. Per-VLAN Spanning Tree (PVST) is a solution for these problems. Per-VLAN Spanning Tree (PVST) is a Cisco proprietary Spanning Tree Protocol (STP) which operates a separate instance of Spanning Tree Protocol (STP) for each individual VLAN. A separate instance of Spanning Tree Protocol (STP) for each VLAN helps VLAN to be configured independently and also can perform better. Per-VLAN Spanning Tree (PVST) requires Inter-Switch Link (ISL).

Per-VLAN Spanning Tree+ (PVST+) is an extension of the PVST standard. Per-VLAN Spanning Tree+ (PVST+) allows interoperability between CST and PVST in Cisco switches and support the IEEE 802.1Q standard.

              Jajish Thomason Google+
Related Topics
• What is Broadcast Storm
• What is Layer 2 Switching loop
• What is Spanning Tree Protocol (STP)
• What is Bridge Protocol Data Unit (BPDU) frame
• Bridge Protocol Data Unit (BPDU) Frame Format
• What is a Root Bridge (Switch)
• What is a Root Port
• What are Port Cost, Port Priority and Path Cost Values
• How Spanning Tree Protocol (STP) select Root Port
• What is a Designated Port
• How Spanning Tree Protocol (STP) select Designated Port
• Difference between Root Port and Designated Port
• Spanning Tree Port States
• Topology Changes in Spanning Tree Protocol (STP)
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How to configure and verify Spanning Tree Protocol (STP) PortFast
• How to enable or disable Spanning Tree Protocol (STP)
• What is Rapid Spanning Tree Protocol (RSTP)
• Difference between Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP)
Per-VLAN Spanning Tree (PVST) and Per-VLAN Spanning Tree Plus (PVST+)
• What are Spanning Tree Bridge Priority and Bridge ID values
• Spanning Tree Path Cost Value and How is Spanning Tree Path Cost Value Calculated
• Spanning Tree Port Priority and Port ID Values
• How to change Spanning Tree Bridge Root Priority value and What is Extended System ID
• How to configure Spanning Tree Protocol Root Primary and Root Secondary
• What is a Root Bridge (Root Switch)
• How to change Spanning Tree Port Priority Value
• How Spanning Tree Protocol (STP) select Root Port
• What is a Designated Port
• How Spanning Tree Protocol (STP) select Designated Port
• Difference between Root Port and Designated Port
• Spanning Tree Port States
• How BPDU is generated and How BPDU works
• Important Spanning Tree Protocol (STP) Timers and their default values
• How to Configure and Change Spanning Tree Protocol (STP) Default Timer-Values for hello timer, forward delay timer and max age timer
• Topology Changes in Spanning Tree Protocol (STP)
• Spanning Tree Protocol (STP) Convergence
• Where to place the Spanning Tree Protocol Root Switch (Root Bridge)
• Spanning Tree Protocol (STP) UplinkFast, Backbone Fast and Portfast
• What is Spanning Tree Protocol (STP) Uplink Fast
• What is Spanning Tree Protocol (STP) Backbone Fast
• What is Spanning Tree Protocol (STP) PortFast
• How to configure and verify Spanning Tree Protocol (STP) PortFast
• How to enable or disable Spanning Tree Protocol (STP)
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• Difference between Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP)
• Per-VLAN Spanning Tree (PVST) and Per-VLAN Spanning Tree Plus (PVST+)
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