Can I put an openWRT appliance in front of my current network to act as a load balancer / failover?

Installing and Using OpenWrt
1

I have an rpi4 running openwrt and I’m adding a second isp to my network, I want to leverage the speed of both networks but mainly provide a failover in case one isp or the other is acting up.

Would it be better to add a second Ethernet adapter straight to my rpi4? Or can I split it out to its own device to reduce load?

I’m unsure of the routing aspects of the setup, my thought is that it’s a static route from the load balancer box to the router, and I don’t really need firewalls at that level of the network as it’s only the 2 wans in and 1 lan out.

2

I would add another ethernet adpater to your Pi and then use mwan3 to handle the load balancing and/or failover policies.

https://openwrt.org/docs/guide-user/network/wan/multiwan/mwan3

3

The pi is currently running sqm, and providing DoH would adding mwan increase the load by a significant margin?

I feel like my pi is mostly idle (also side note, just hit 10 days uptime with a setup you guided me in creating)

4

No, I don't believe so. Probably more load if you do load balancing vs failover, but I think both of those options should be fine in terms of no significant added load.

Woohoo!! Glad to hear it!

5

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