Network background: I work for a school system in Kentucky. In this state all schools internet connection, DHCP, DNS, Firewall, etc. are managed by the state and stored in what we call the KEN Cabinet. We connect to this cabinet with a core router. Each of our schools has a network switch (x460-G2’s) that is connected to the core router (VSP8400) via 1Gb fiber via our ISP. We have set VLAN’s with IP ranges from the state that are allowed internet access.
Project: We are adding Cloud hosted VOIP phones to all of our locations. We are trying to create a backup internet connection at each school using a Cradlepoint device providing cellular data.
The VoIP phones are on the same data network as the client computers since they have to reach out to the internet. The Default Gateway for this data network is located on the Core Router. If we lose ISP fiber connection between the core and the school switch, we lose DHCP and DNS access.
From what I’ve read, flow-redirect may be a solution but I can’t for the life of me figure out how to get this to work with the way our network is built.
I hope this all makes sense… Any suggestions?