I too would like to know more on this. I use AX55 routers which recently added an IoT network along with device isolation options. Perhaps this should be explained by TP-Link in a separate article on...

This would be a nice feature, especially when you have to access more than 1 router.

@Kevin_Z With version 1.2.3, the issue with the orange LED in post #36 above appears to be fixed.

@Kartronics12 Unfortunately, only the main SSID is extended. This issue has been addressed in other posts but never has been fixed.

@KJK Thanks for the link and I will certainly take a look at everything. I think I understand enough about Layer 2 and MAC addresses and deduced that broadcasts are probably used to discover any...

Just a curiosity question... I am configuring various TL-SG105E switches and some of them had been set up on other subnets (such as 192.168.200.x). The configuration utility is able to find a switch...