Hi Guys,
I want to ask for your help to have a look at one of our problems that we configured STP for Cisco switches.
In this scenario
All the switches have that stp mst mode configure.
Except that all the access switches don't have instance 3.
For instance 0-1, the access sw1 port 47 will be blocked and the distribution 2 will become root bridge (which is correct i suppose)
When come to instance 2-3, the access switch 1 will elect itself as root bridge
and will be block the same port (gi1/0/47) for all instances.
We have tried to enable debug and clear the stp protocols, configure name and revision number but the problem still the same.
Is there any config missing, or its the structure that is causing the problem? Please kindly advise. Thanks!
