have two DC, with 2 N5K on each DC. I want to connect these pairs with Fabricpath to have full bandwidth used. I've seen that vPC back to back can do the trick. BUT Fabricpath brings vPC+ with it, and I use FEX on each site. So is it worth having Fabricpath to get the vPC+ or no and I must consider the vPC classic with FEX and vPC back to back between pairs?