How Do I Know My Load Balancer Is Handling Failover Properly? (Home Networking, TP-Link TL-R470T+)
Channel: Daniel Rosehill
Date: 2021-09-14

Recently, I set up a TP-Link load balancer (TL-R470T+) on my home network. Its purpose on the network is to take in connectivity from my primary WAN (ISP) and my cellular router (WAN 2) and to automatically handle failover in the event that WAN 1 is unavailable. 

If you've gone for a similar configuration in your home network and everything looks to be set up and running nicely ... how can you be sure that the load balancing is handling your networking as you expect it to? 

One way is to periodically "spot check" your connection by using a site like whoismyisp.org to see where the connection is coming from. A second is to keep a periodic eye on the connectivity statistics page which will show you statistics about which interfaces were being used to download and upload traffic. 

If you see that the main line is handling the vast majority of communication with the internet ... that's a pretty good clue that everything has been set up properly and is working fine. 

(On the flip side, if you know you have spotty connectivity and you're not seeing any activity on the failover line at all ... this might also warrant some diagnostic work!)

== Related == 

V2 of high availability home networking setup with automated ISP-to-cellular failover:

https://www.youtube.com/watch?v=9coFREuXPD4&ab_channel=DanielRosehill

By: Daniel Rosehill (danielrosehill.co.il)

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