Hey Karl, There are a few dongles that work OK, Optus prepaid ones work, Telstra prepaid ones work, as long as you have a USB port a lot of the USB dongles work and just create a LTE interface once connected. The easy way to use them is to just create a low cost route to go via your primary link and a higher cost one via your VPN, if the main link goes down then the route is unavailable so your traffic will go via the 4G It's pretty straight forward, I think there are even examples in the Mikrotik Wiki as well. Regards Paul -----Original Message----- From: Public <public-bounces@talk.mikrotik.com.au> On Behalf Of Karl Auer Sent: Wednesday, 9 October 2019 5:44 PM To: MikroTik Public <public@talk.mikrotik.com.au> Subject: [MT-AU Public] State of 3G/4G fallback on MikroTik? We need to quote to a client for two routers capable of running a VPN between two sites - easy, that's a MikroTik. But they want a fallback to 3G/4G so that the site that falls back keeps Internet access AND so that the VPN keeps running. What's the state of MikroTik 3G/4G fallback? Last I looked it seemed very roll-your-own, and supported only a few very specific dongles... Ideally it would work like the (vastly more expensive) Merakis and just fail everything over to the secondary link if the primary fails, where "fail" would be either a ping test or interface down. That said, I'm OK with a solution that needs more work, as long as once done it is set-and-forget. Any pointers? Regards, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (kauer@nullarbor.com.au) work +61 2 64957435 http://www.nullarbor.com.au mobile +61 428 957160 GPG fingerprint: 887A DA07 4DCC EE76 B413 27D4 C638 4189 6CF0 D556 Old fingerprint: 8454 EE43 6215 B6DD 1B4D 9D8D 984D 7BA1 7378 A38D _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au