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what really counts is the number of different Vlans involved. With 50 Vlans you can use PVST without any concerns. If you decide to use MST you need to provision some ... See More
Please refer to the following article Multiple Spanning Tree (MST) https://networklessons.com/spanning-tree/multiple-spanning-tree-mst/
The benefit is having multiple root bridges for different vlans to load-balance the level 2 traffic and have redundant root bridges for each bundle of vlans.
Multiple Spanning Tree (MST) is an IEEE standard inspired from the Cisco proprietary Multiple Instances Spanning Tree Protocol (MISTP) implementation. The Multiple Span ... See More