Bridging Wi-Fi to Ethernet, post Airport Extreme

i'm considering only these to have better hardware : netgear RBK50V RBK53 RBK52W RBK50.

( others, not-considered by me : netgear RBK43 , RBK40 , RBK30 , RBK23W , RBK23 , RBK44 ).

my short-time search is showing:

users are able to run openwrt & playing with routers with very similar hardware : here (RBR50).

i think, its similar to RBK50.

Tech specifications, & openwrt firmware:

https://openwrt.org/toh/hwdata/netgear/netgear_rbr50

by the way , OpenWRT firmware is not yet available to load into AirPort Extreme,

but users are working on it, follow this page:

• https://forum.openwrt.org/t/adding-openwrt-support-for-apple-airport-extreme-time-capsule-kirkwood/62284 (or here).

differs from router to router, most use a webclient interface to be configured

googling a <insert router brand and model> configure network bridging

would likely bring some hits to guides as how you manage

It depends on the equipment you are using. What are you using ... router ... WiFi access point ... switches ... be specific - make, model, how you have things connected, etc. We're in the dark without info about your setup.

Verify that your Monoprice Wi-fi Mesh Router is set up in bridge mode and its built-in DHCP server is off (bridge mode itself usually disables DHCP).

Not being in bridge mode would explain what's going on. If it's not in bridge mode, it's acting as a second router and using its own DHCP server to provision IP addresses on top of the addresses your your ARRIS router provides. In a bridge setup you want only 1 device handing out IP addresses, in your case that would be the ARRIS router. Also make sure that your Monoprice is connected via its WAN port to one of your ARRIS router's ethernet ports.

OpenWRT firmware (FW) based powerful WiFi router, can connect/bridge a sub-WiFi network under an existing WiFi home network, etc, via wifi or via wired connection, etc, etc.

OpenWRT has too many FEATURES to fit into this single post, or even 5 posts.

Not all router's firmware can be upgraded into OpenWRT, so you have to research in their site & forum, what router hardware-wise fits your necessity.

Some users also like DD-WRT firmware, its based on an older OpenWRT FW, but was heavily customized by it's devs to make the openwrt interface much easier for more newer users (aka: newbs) into computer-networking.

There are other firmware choices as well, see here in wikipedia, etc.

You will want the Wi-Fi configured as an access point or what Apple called "bridged"—this makes the Wi-Fi and wired networks appear connected and this with the appearance of no intervening IP router–or you will want to use an IP subnet for Wi-Fi and a second IP subnet for the wired network and with an IP router connected between those and with DHCP services provided by some box on each subnet.

If you want to run your own services on your network, not the least of which is DHCP services, and want a network that can have a couple of different Wi-Fi APs connected and active for better coverage—configuring each of your Wi-Fi boxes as an AP works well. This because an AP may or may not provide DHCP or other services.

If you choose to have a router between the networks, you will have to control what traffic traverses the router. You probably don't want it running as a firewall, for instance. Some network protocols and related network traffic such as mDNS are not (or are not, by default) passed through an intervening router. Whether and how a router can pass that traffic varies. Check the vendor docs.

Generally, you want exactly one box on your network providing NAT, and that is the box at the edge of your network, adjacent to your ISP. No other boxes within your network should be performing NAT. (This absent very unusual circumstances.)

I mostly run a mix of ZYXEL, Ubiquiti, and Synology gear on the networks that I'm managing, and some network services from Mac systems in certain cases. What D-Link and NETGEAR boxes had been around have all been retired.

I looked at the AC1200 user manual and it was not very descriptive. However, in the photo of the router wizard (p. 11) I noticed a setup button. There may be more configurable options under setup. In other Monoprice routers, bridge selection is in a setup section called Operation Mode.