Classic STP was designed for networks where to seconds of downtime was acceptable. If a root port fails, the switch waits Max Age ( seconds) to confirm the failure, then spends Forward Delay in listening ( seconds) and learning ( seconds). Total: seconds. In modern networks running voice and video, this is unacceptable. Users notice a -second outage. Applications drop connections. This slow convergence drove the development of Rapid Spanning Tree Protocol.
##### ###### ##### ### # # ### # # ###### ## ## ## ## ## ## ## # # # # # ## ##### #### ##### # # # # # # # #### ## # ## ## ## ## # # # # # ## ## # ###### ## ### # ### # ######
$ curl repovive.com/roadmaps/network-design/spanning-tree-and-link-aggregation/why-classic-stp-is-slow
░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░██████████████████████████████████████████████████████████████████████████████████████████████████████