I have a ring topology with 5 switches running MST Standard with 2 instances. The Aggregation switch is configured within a MST Region, and the others 4 switches belong to another MST Region. I am doing some tests to find out the real convergence time in the event of a link failure. I realize that when a link in the ring goes down, the convergence time is 1-2 seconds, but in some situations (not identify yet), when a link in the ring comes up the convergence time is 30s. The question is:
Can anyone confirm me that if everything is fine in my topology (all the switches are working correcly, the links are point-to-point, there is no erros in the links, the proposal-aggreement mechanism works fine, etc), the convergence time should be 1-2 seconds in the event of any link going up or down ?
I'm sorry for my english (I am from Argentina).