@ChrisFurlough 

I assume the upstairs Deco is setup as a satellite to the main, downstairs, Deco.
In that case, the two Decos are offering a single network.

What is the issue you are observing?

 

  @yves_b 

Yes, that's what I've at least attempted.  The Android app is confusing at the best of times.

 

What I'm seeing is the wireless network is 192.168.48, and the wired network is 192.168.50.

 

And I'd like them both to be 192.168.50

  @ChrisFurlough 

Did you configure the Deco to run in Router or in Access Point mode?

 

Are all your devices configured to obtain dynamic IP addresses via DHCP?

 

Do you have anything else, in addition to the Deco, acting as a DHCP server?  

 

Which LAN IP (and which subnet mask) did you configure in the Deco app?

  @ChrisFurlough 

If the subnet mask is 255.255.252.0, then 192.168.48, .49, .50 and .51 are actually being part of the same subnet.

 

I understand you are surprised by the unfamiliar configuration.  Does it cause any issue?  Is there a reason to modify the current setup?

 

I believe it is possible to ensure all addresses will be assigned under 192.168.50, but it will severely reduce the amount of available addresses.  How many devices do you expect to connect, in total, to the Deco network?  Do not count the amount of devices simultaneously connected, but the number of distinct devices "known" by the network.

Currently, there are about 15 devices on the network total. I can't imagine it ever going over 25. Some of my devices aren't currently DHCP'd because I needed them to be on specific addresses for Port Forwarding. I realize this might be silly now, but that's the way it was configured before. I guess, in theory at least, DHCP'd addresses tend to be given to the same device each time, and that shouldn't impact my routing. But I didn't do it that way before. What's going on is that the static IP'd devices are on the .50 network, and all the DHCP'd WIFI devices (including the printer) are on the .48. If I change the netmask to 252, I can talk to the printer, but not my NAS, which is on the .50 network. If I change the netmask back to .255 I can see the NAS, but not the printer.

  @ChrisFurlough 

I have two suggestions:

(I prefer the first one, the second one preserves your previous way of working)

 

1) It is possible, on the Deco, to reserve IP addresses for some devices.  By doing that, the Deco will always assign the same addresses to those devices.

That way, all devices are using DHCP, and will use the same subnet mask.

 

You can configure that via three settings, all under the "advanced" setting of the Deco: LAN IP, DHCP Server, and Address Reservation.

That involves changing the configuration of your "static" devices, to use DHCP.

 

 

2) Assuming the mask on your static devices is 255.

Keeping your static devices with a locally configured IP address in the 50 range, and a subnet of 255.

Changing the IP address of the Deco (LANIP) to an address in the 50 range, corresponding to the gateway statically configured on the static devices.

Setting the mask on the Deco to 255, and the DHCP range to avoid the addresses statically configured on your static devices.