I read similar topics and think I have a grasp on things but still have a question regarding this scenario and the management IP of the switch performing the ISP routing. The management IP cannot have a gateway of it's own L3 interfaces nor can it be the same IP address as one of those interfaces, correct? So in this scenario would I need to increase the /30 to a /29 so the management IP can be unique? That or have an access port on the management VLAN the connects to the MX LAN? Any help is greatly appreciated.