Deco Network Guest WiFi gets no DHCP function on Wired Ethernet Backhaul
Hello!
I have been running a mesh network at home using a Deco X50-5G as my router (relying on its 5G connection for Internet) and a three-pack of Deco X50s as satellites around the house. The initial setup relied on a wireless connection between the X50-5G and the X50s, with devices connecting either via Ethernet or via Wireless on the X50-5G or the X50s.
The home network has some wired devices, some wireless devices, and a Guest Network (using the default VLAN id) I want to keep separated.
Here is a simple original topology, before the changes that caused the issue:
X50 #1 (((wireless))) X50-5G (((wireless))) X50 #2 ---(ethernet)--- (TL-SG105) ---(ethernet)--- X50 #3
This setup worked fine. A few days ago, however, I ran an Ethernet backhaul using a 25m long Cat 6 UTP cable between the X50-5G and X50 #2, resulting in the following topology:
X50 #1 (((wireless))) X50-5G ---(ethernet)--- X50 #2 ---(ethernet)--- (TL-SG105) ---(ethernet)--- X50 #3
The Decos are connected directly on each other, without in-between switches except for the TP-Link switch mentioned above, which has never caused problems before.
The problem that appeared is as follows: since I ran the Ethernet backhaul between X50-5G and X50 #2, when relying on X50 #2 and X50 #3 for the Guest WiFi, devices no longer get any DHCP treatment. That is, they get no IP, Mask, Gateway and DNS assignments from the X50-5G, assuming they can even connect to the Guest WiFi through X50 #2 or X50 #3. The Guest WiFi works as intended for X50-5G and X50 #1.
I have confirmed that removing the Ethernet backhaul in question restores functionality, as well as that the Ethernet backhaul is properly manufactured (both using a UTP tester, as well as a laptop which achieves Gigabit Ethernet speeds on the LAN).
I have tried using various ports for the Ethernet backhaul, without success. How do I run the Ethernet backhaul while keeping full Guest WiFi functionality?
