Rene,
Hi. Can you please further clarify the following:
"BPDUs are originated from the root bridge so if we receive BPDUs on an interface the switch knows it can reach the root bridge on this interface. We have to go through the blocking (20 seconds), listening (15 seconds) and learning state (15 seconds) so it takes 50 seconds to end up in the forwarding state.
The good thing is that spanning-tree solves the link failure automatically but it also means that we have a downtime of 30 seconds. If you want you can tune the forward delay timer to speed up this process down to roughly 14 seconds."
In the first part of the article when the link between A and C is severed what is the convergence time, 30 seconds or 50 seconds? I believe you mention that it will automatically switch over to the new root port, and then just wait the listening/learning (30 sec)?
Many thanks,
Thomas
Many thanks.