Hi, I’m trying to establish if it is possible to use our Netgear 4G router (M1/MR1100) in IP passthrough mode as a failover WAN, using these instructions as a guide (example 2).
As I see it, there are 2 possible issues with this:
- The external IP address of the 4G modem periodically changes, meaning that defining a static route to a next-hop using an IP address is going to need adjusting whenever the upstream connection is refreshed
- There is a quirk in the Netgear firmware that they have thus far not fixed where the IP address assigned via dhcp in passthrough is a /32 address, essentially putting the WAN NIC into a subnet of itself. The BSD based products I’ve used in the past have an option (‘supersede subnet-mask’) which instructs the WAN to adopt the IP address issued by the modem but use a subnet mask of your choosing, eg /28. Is there a similar option in Vyos?