I am wondering why Root Bridge generates Configuration BPDU at every Hello Timer (default 2 seconds)?
Non-Root Bridges relays the Configuration BPDU and keep the lowest BPDU for each port. Why to keep the lowest BPDU for each port? What happens if a port receives a new BPDU with higher Sender Bridge ID or Root Path Cost?
BPDU(Bridge Protocol Data Unit) is a protocol which is a feature of Spaning Tree protocol and enhance the functionality of Manageability,reliability and security of Network Infrastructure.
With the help of BPDU ,we decide the root port in the connected connected and BPDU the network from the loop and it generate in every two second .
If there is any change in the network connectivity (Switch consider as root switch) goes down ,BPDU packet will decide the next root in the network.