What is PVST PVST+ and RPVST+ Spanning tree? How to configure PVST?

Описание: What is PVST PVST+ and RPVST+ Spanning tree? How to configure PVST?
https://www.internetworks.in/2023/02/...

Per VLAN Spanning tree (PVST) is cisco's proprietary version of STP which delivers more flexibility than the common spanning tree version. PVST works on a separate instance of STP for each VLAN. In normal STP, CST (Common Spanning Tree), only one instance can be used for the network. There are no specific instances per VLAN. This allows the STP on each VLAN to be configured independently and offers better load balancing and tuning according to the conditions.

but as we know PVST is a cisco proprietary and because of its proprietary nature, Per VLAN Spanning tree (PVST) requires the use of a cisco inter-switch link (ISL) trunk but in coexist network where CST is working, and we configure PVST there will be problem occurs both require different trunking methods and the problem remains BPDUs are never exchanged between these types of STP.

the solution is Per-VLAN spanning tree plus (PVST+) it's also the cisco proprietary version of STP and allows the device to interoperate with both PVST and CST. PVST+ act as a translator between a group of CST switches and groups of PVST switches. PVST+ creates an instance for each VLAN and in each instance, a different STP process occurs, a different Root bridge is selected, different port roles are used, etc.



Rapid Per VLAN Spanning Tree Plus (RPVST+) it's a Cisco proprietary STP version. Again, it has an instance for each VLAN and each VLAN has a separate STP process just like PVST but RPVST+ has a faster convergence advantage if we compare it with PVST+.


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