Hi Friends .. when there is any topology change in non-root bridge , it will generate the TCN bpdu and it will send to all bridges , once root bridge sends the TC bpdu it will flush out the mac table in 15 seconds. What happens when there is a topolo...

Hi , Can anyone tell me which is elected 1st a DR or BDR ? Can anyone explain in detail how this DR election goes in ospf process packet wise ?

Hi , We know that more number of ports can be configured to same vlan. How vlan distinguish between the ports ? How vlan knows from which port this frame has come ? in tagging we add the vlan id to the frame and not any other info ? little confused o...

Hi When a switch is set as secondary root , the bridge id will come less than root bridge id. How this is notified in the BDPU ? Will it not create a confusion in the root bridge selection. how this is handled in STP ?