@AfricaCommander BE550 v2 doesn't support link aggregation according to its user guide or at least this information is missing. Here are the BE router models that support this feature.

@Baxajaun Check this comparisson - usually the TP-Link Easymesh products have only 802.11k/v implemented for fast roaming.

@PressFToCode Home grade routers, like C24 don't have SSH service implemented. If you find that TCP port 22 is opened that is for Tether app access only - details.

@HendraLink This won't damage your router - you can go back to your initial configuration. I can't say what exactly causing these logs but if it's a FW, probably a next FW release will fix that. If...

@HendraLink In this case you don't have to change the DNS settings. Try something different - Main router's LAN → satellite router's LAN port and test again. If these logs are still there, reset the...

@HendraLink You may try the following on your main BE230 and test if there's any improvement: After this change reboot your main BE230 first, then your satellite BE230 and test.