LAN devices are not reachable from an Ethernet Backhaul connected Deco
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Dear Support!
I have a TP-Link mesh system consist of 5 Deco units: 3 M5 and 2 M4R.
Topology: [ISP ONT device]---[Main Deco M5]---[TP-Link Gbit switch]---[Deco M5 upstairs]. These connections are with Ethernet Cable. The rest one M5 (Living room) and two M4R (Garage, Attic) units are connected to the Main Deco M5 with Wireless Mesh only.
Problem is the following: any clients connected to the "Garage" Deco unit are not reachable from any device which are nearby and connected to the "upstairs" Deco unit. Ping request of devices says connection timeout. When I move closer to other Deco units then suddenly those devices are reachable again, ping works fine from the testing device. If I go back to the nearby of the "upstairs" Deco, then ping does not work again: connection timed out.
The problem is only with those clients which are connected to the "Garage" Deco. Other devices connected to another Deco routers are reachable nearby of the "Upstairs" Deco unit. Internet access is also working fine nearby of this "upstairs" Deco, I encounter only local LAN issues as described. Internet access is also working fine for those clients, which are connected to the "garage" unit.
Pinging of the affected "Garage" Deco itself works fine, but any connected devices to this unit doesn't reachable.
I have already rebooted the Decos, also switched temporarily two Decos: moved the M4R from the "Garage" to the "Upstairs" and moved the M5 from "Upstairs" to the "Garage". With this setup the results are the same.
For other testing I removed the Ethernet cable from the "upstairs" Deco, with this setup the issue is solved, but for me it is not a solution I need the Ethernet backhaul to be working here.
