can anyone please interpret this sentence please : i mean which command(s) will do this requirement and for which purpose(s)
"spanning-tree must immediately delete dynamically learned MAC address entries on a per-port basis upon receiving a topology change"
There is no command, this is a part of the spanning tree process ie. if there is a topology change then switch mac addresses must be flushed because they could be pointing to a non existent path after the recovergence.
Has itoccurred to you that the task/home work question might be incorrect? As jon mentioned. This mechanism is integrated into spanning tree for obvious reasons.
i think i figure it out what Question exactly means
let me i dig into question
before this task
asked to ensure that switch run SPT mode which maintain separate SPT instance for each Vlan
so as i sure this procedure will be occurred during all SPT process so i think this task should insist on previous task which is mentioned above :
i think designer was thinking about spanning-tree mode rapid-pvst
i am not sure really what does mean by this task ( not sure whether this is a informational sentence or have to do something special)
too much eager to find it out !!!!!!!!
just one imagination can comes into mind which is just in rapid pvst we have immediately deletion of MAC address due to TCN so in others (RSTP,MST,legacy STP...) we Do not have immediately
they will be done but not quickly as a question mentioned !!!!
just this i think can be logical
as question mentioned int should occurs rapidly
"Rapid PVST+—This spanning-tree mode is the same as PVST+ except that is uses a rapid convergence based on the IEEE 802.1w standard. To provide rapid convergence, the Rapid PVST+ immediately deletes dynamically learned MAC address entries on a per-port basis upon receiving a topology change. By contrast, PVST+ uses a short aging time for dynamically learned MAC address entries"