In MSTP, does each MSTI calculate an independent spanning tree using the RSTP algorithm?

In Multiple Spanning Tree Protocol (MSTP), each Multiple Spanning Tree Instance (MSTI) does indeed calculate an independent spanning tree using the Rapid Spanning Tree Protocol (RSTP) algorithm. This characteristic allows MSTP to support multiple logical topologies over the same physical network infrastructure.

MSTP groups different VLANs into MSTIs, enabling efficient use of network resources by optimizing the topology for each instance based on the specific traffic and connectivity requirements of the VLANs included in that instance. Each MSTI operates as if it is an independent spanning tree, allowing for faster convergence times and better overall network performance.

Thus, although MSTP may run multiple spanning trees, they are all calculated independently and operate according to the RSTP principles, which enhance the speed and reliability of loop prevention in Ethernet networks. This capability is particularly beneficial in complex networks where multiple VLANs exist, maximizing efficiency and redundancy.