@JohnXYZ Have you updated your deco over the last months ? they have issued a firmware fixing this (two updates). I cannot test it as i ended up redisigning my network in order to use the router mode...

@n4bs nothing of course, according to other recent similar topics here TP link said no ETA on the firmware. So i went to the only solution of changing to router mode. check my thread:...

@CKK I was ranting about this quite a while back. I finally gave up. As i said this is clearly false advertising and a major foul from tplink the Guest mode in AP. Don't wait for the firmwarte. I...

@CKK That is an old firmware ? where did you see the guest network ? anyway, the point is exactly that, guest network=NO ACCESS TO ANYTHING IN YOUR LAN only internet access

Kevin_Z wrote @Vassilis Hello, the Deco M4 has the gigabit ethernet port, it can handle the current throughput. Interface 2 Gigabit Ethernet Ports (WAN/LAN auto-sensing) per Deco unit You can take...

ok, @ajharvey and @Kevin_Z i can confirm that the suggested solution now works. Connected two cables on the M4 in router mode then to the switch a discussed. Guest network is isolated as designed....