If i have vlans 2,4,6 with priority 8192 via CS_1 going out of this core switch over a les link to the datacenter and vlans 3,5,7 with priority 8192 via CS_2 going out of this core switch over the second les link. when traffic returns back to lets say vlans 3,5,7 do they naturally travel back the way the came i.e the second les link