As STP reconverges, traffic for the specific VLAN that has caused the reconvergence will be effected.
This is why you should design a deterministic network that has the root switch and the secondary for each VLAN already configured. In other words, "rig" the election to avoid an interruption in data flow.
Thank you for your response. I understand the need for such a design. I am trying to determine if data traffic within the same vlan on the same switch will be affected.
For example, if I have two servers in the same Vlan5 on the same switch, connected to ports gi7/1 and gi7/2, will the IP conversations between these two servers be interrupted if the fiber link to the "root" switch is disturbed OR is local traffic on the switch safe while STP reconverges. The traffic I am interested in will not leave the switch.
As you said that you are having PVST+ enabled and using it in your LAN/VLAN environment, you must have configured 'portfast' on access ports of servers. That portfast feature actually prevents some application-timeouts at the time of STP convergance.
No doubt your data communication between the servers will be hampered momentarily due to STP convergance but portfast will take care of your servers' ease to get the port back up/forwarding very early.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...