Hi,
I have one layer 3 switch with 3 gigabit port connecting two sites with fibre. For redundance I have one catalyst connected in G1/1 with directed link laser for other catalyst in site B. But, when up the interface in catalyst the spanning-tree enter in looping. My question is: What is the bether configuration of spanning-tree to prevent this looping? I have that to change some thing in layer-3?
Thanks for help!