Introduction to Spanning-Tree

Hello Suphakorn

It is possible to run different STP modes and have them work together, but this should be done with care. For example, RSTP is backwards compatible with standard STP. Similarly, MSTP is compatible with RSTP, and even PVST and RSTP can be made to function together. However, it is always a good idea to try to keep the same STP mode on all of your network in order to avoid any L2 loops that may occur due to an incorrect configuration or a difficulty in the interoperation of two different STP versions.

I hope this has been helpful!

Laz