We're transitioning our main office to a new VoIP solution (feel free to welcome us to the 21st century) and we have a bit of an issue with our failover link.
We have a backup DSL link but it's really only capable of about 5 Mb/s (we're somewhat rural) and can't handle the WAN traffic of ~300 clients. Is it possible to configure traffic shaping in a way that allows only the Voice VLAN to access the WAN 2 and cellular uplinks when the primary link goes down?
EDIT: Our gateway is a Meraki MX84. I understand we'd need a more esoteric SD-WAN solution to allow seamless failover without dropped calls, I haven't really explored that option yet.