my topology is like that:
vlan 30 - router A & B - mpls cloud (no vlans) - router C & D - vlan 30
I've created two xconnect tunnels (A-C and B-D), but the first is working, the second is for a cold backup.
How could I use both at the same time? Maybe I've to transport the BPDUs, to loop prevention, but how? Any advice will be appreciated