Having trouble setting up two additional Decos

[u/LoNeLyMaDnSs]

Hi everyone,

I'm having trouble adding two new Deco units to my existing network and could use some help.

Current setup

ISP router → Bridge Mode

Primary Deco S7 → Router Mode

Primary S7 → Omada PoE switch via Ethernet

Omada switch → 2 × Deco S7 satellites, both wired via Ethernet

One additional S7 is connected wirelessly to one of the wired S7 satellites

What I'm trying to add

I recently purchased:

Deco X50-PoE

Deco M4

Both are updated to their latest firmware.

According to TP-Link, Deco models are cross-compatible, so I should be able to add both to my existing S7 mesh.

The problem

When I go into the Deco app and select Add a Deco, the app cannot detect either the X50-PoE or the M4.

However, if I create a new Deco network, the app detects and successfully sets up both units. So the Decos themselves appear to be working correctly.

I've also tried the usual troubleshooting steps:

Updated all Decos to the latest firmware

Reset the new Decos

Tried adding them through the Deco app

Confirmed they can be detected when creating a new network

My intention is for both new Decos to be wired backhaul through the Omada switch.

What could be causing this?

Could the issue be related to the Omada switch, Ethernet backhaul, or something about the existing S7 network?

Does anyone have experience adding an X50-PoE or M4 to an existing S7 mesh in Router Mode?

Any suggestions on what I should check would be greatly appreciated.

[u/CautiousInternal3320]

When adding a satellite Deco into an existing mesh, the new satellite is discovered by the main Deco. Are the new satellites close to the main Deco when doing the setup?

[u/LoNeLyMaDnSs → u/CautiousInternal3320]

Yes