So I just bought an RE300 dual band mesh extender to replace my old N300.

Unfortunately despite checking my C7 router supported one mesh it turned out I needed v5 hardware & mine was v4 :(

No problem, it was 6 years old & C80 on sale @ Amazon so set that up & slightly better speeds but the mesh network now worked.

I noticed the C80 had an IoT network setting so activated that & started setting up various switches etc. Except when I got to the end of the house with the new extender the IoT network was gone!

It appears that for some reason the extender's not replicating the IoT network even after restarting both the extender & the router. Pretty annoying as I then had to reset the devices I'd already added, as there's not much point having only some devices on a separate IoT network :(

Am I missing something obvious or will a mesh network only work for one network ID?