[c-nsp] Same VLAN in more than one MST Region

[Lawrence Wong]

Hi everyone,

I'm thinking of implementing MST instead of PVST+ in my network and is looking through the various Cisco docs.

While the docs stated that a VLAN can only exist in one instance in a region, I've not come across a doc which says that the same VLAN cannot exist in more than one region.

i.e.

Region A, instance 0: Vlans 1 - 4094
Region B, instance 0: Vlans 10,20,30
Region B, instance 1: Vlans 40,50,60
Region C, instance 0: Vlans 100-200
Region D, instance 0: Vlans 100-200


All switches are in the same network.


Would anyone be able to shed some light or experience on this?


Thanks and best regards,