I recently learnt a rule in STP: only Designated ports forward BPDUs.
However, I'm not sure about this in RSTP since ALL switches generate their own BPDUs every few seconds. So, in a certain LAN topology a switch may have a root port and an alternate port and no designated port.
Does this rule still apply? Or will switches in RSTP forward their own BPDUs via their root port or alternate port as well?