I am running 3 MST instances running on (including MST0) wherein i have defined SW1 as root for the MST0 & 1 while SW2 root for MST2. Both switches are interconnected. These switches also connect to the access switches. The issue is all switches (including SW1, SW2 and access switches) in the network are acting as spanning-tree root except for the MST0. MST0 is showing the right configured root.
According to my understanding the spanning tree should have one declared root. Need your help in correcting my understanding. Note the network is running fine.
I have changed the priorities on the switches. What i found is that the switches are seeing the other switch in different MST region and the ports towards the confiugred root are in master forward state.