Comcast recently upgraded our cable modem to the CBR-T and since then we seem to have issue with failover.
When we fail over from our primary to a back up nothing works and when we fail back any traffic bound for the WAN 2 (our cable modem) seems to time out.
I don't know how the previous device was configured, but we have a /28 network for this with our MX handling all the traffic. I'm wondering if the new cable modem isn't responding correctly to failover.
Can you put these modems in bridge mode so we don't need anything from Comcast but the handoff. I love our Comcast Metro Ethernet, but the modem is giving me headaches.