As stated in the sentence "The TCN only has an impact on the aging time"
When there is a TC-N received by the switch. It will change it's aging time to 15 sec or max_age + forwarding delay = 35. My confusion is : it will change it's aging time for whole mac forwarding table or Case 1 - TCN recieved on access port for VLAN 20 age out all mac address learned on that access VLAN 20 Case 2 - TCN received on trunk port for VLAN 2 and VLAN 3 age out for all mac address learned on the trunk for VLAN 2 and VLAN 3 Case 3 - TCN received on trunk port for all allowed VLAN age out for whole MAC forwarding table. Thanks -- Thanks Kamlesh Sharma
