I am testing the flex link feature on 3750 and 3560 switches in my lab. I found the following problem:
When the primary link is going down on the access switch it takes one second to switch to standby link. But if after the switchover I remove the cable from the current active port in 30 seconds the traffic is stopped. I measure it with the stopwatch and it seems that after the first switchover the standby port could not be back active (could not forward traffic) for maximum 30 second. After this time there is no problem with the switchover.
Does anybody know what is the reason for such behavior and if I can fix it somehow?
Just to make it clear I have already try to configure the mac-address move feature but it does not help. I have also try to configure the portfast on the links that are working as flex links but this also does not help either.
Thank you in advance