Cell Network <-> LAN "Bridge" Mode?

General
1

To eliminate one level of NAT I’d like to place my MAX BR1 Mini 5G in a “bridge” mode.

This thread: Pepwave MAX BR1 Bridge Mode? suggests all I need do is change the Cellular WAN in connection from NAT to IP Forwarding and that’s it.

But when I do that the router connected to LAN 1 claims it’s no longer connected to the Internet. That wasn’t unexpected. I rebooted it. Still no Internet.

What I expected to happen, after the router reboot, would be it would get the IP address assigned by the cell network. But instead it continued to reflect the address that had been assigned to it by the Mini 5G.

I’m wondering if I also have to check IP Passthrough?

2

Leave it in NAT mode, and check IP Passthrough. The Cellular IP gets delivered to the first connected device on the LAN of the BR1 and teh BR1 is to all intents and purposes transparent to that LAN device.

3

Thanks, Martin.

Thing is, the Info for that option says:

Click _here_ to configure LAN static route for
IP Passthrough address.

With dynamic addressing from the cellular WAN side there’s no way to know what the gateway address is, not-to-mention it could, probably will, change.

With a true passthrough mode the LAN client should get the gateway, DNS server(s), etc. from the cell WAN DHCP server.

ETA: Be interesting to understand what the purpose of that note is, because it would seem the client does in fact get the default route from the WAN side.

4

Yes, was about to say that it is not needed for Ip passthrough.
This lets you add a static routes that get advertised to the LAN for networks that are accessible using the IP Passthrough address. Very rarely used in my experience as most of the time we use IP passthrough to get a public IP pushed to a LAN device.

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