VOIP Routing

We are ready to deploy our XG210 but have one last rule we need to put in but can't get it right. 


I need to push all VOIP traffic across a specific WAN interface, coming in and going out. We have a specific VLAN setup for the VOIP network and this is a totally cloud-based system. We tried an IPv4 policy route but that did not work. It actually blocked all traffic to that subnet. 


Any thoughts or has anyone done this before?