Good morning. You are absolutely on the right path. The statement you are having trouble with is configuring the switch to add vlan 76 to MLT 203. MLT 203 appears to be part of the fabric so to assign a vlan to it is unnecessary. If you have the i-sid set for the vlan, which you do, spbm will do the rest. So, try it without entering that command and see if your routing tables get updated throughout the network and test connectivity. So to sum up, you shouldn't need that line of configuration.