Regarding a next change we have to do, we are studying spanning tree behaviour.
Does the following statement is true ?
In the case of topology change, if a new BPDU is received:
Currently: Root port A and designated ports B and C are forwarding, and ND port D are blocking.
If, after the new BPDU received: 1) the root port A become a designated port, and the designated port B become root port, do these two ports will simply stay in forwarding mode, or do these ports will restart the process with Listening state, Learning and Forwarding ?
2) the ND port D become designated port, so this port will immediately pass into Listening, Learning, and Forwarding state ?