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Router assigning wrong LAN IP to new devices (alien.top)

submitted 11 months ago by PurpleNurpe@alien.top to c/homenetworking@selfhosted.forum

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So my household has 3 routers, 2 Asus RX-AX86U’s and 1 Actiontec T3200M (ISP Router).

When I first got my Asus AX86U everything was running perfectly fine! But once I got my second AX86U for the living room (same room the ISP router is in) I’ve noticed that any new device that connects to my network is being assigned a LAN IP from our ISP router rather than my network.

My LAN IP’s typically go 192.168.50.xxx while our ISP router goes 192.168.1.xxx

If anyone has an idea I would greatly appreciate it!!

If I could unplug & ditch the ISP router I would however, it is required for actual television + the family uses it.

Edit; Manually assigning the IP via device MAC seems to work but extremely obnoxious to do every device.

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[–] poorlywrittenlife@alien.top 1 points 11 months ago (3 children)

That is normal behavior when you hook one router into the ISP router without disabling routing capabilities with the ISP router first. I've experienced this very same thing.

Sounds like you have a modem/router from the ISP. You have to disable routing capabilities on the ISP device (Basically bridge mode). Then all routing can be left up to one of the Asus routers. I would put one of the 2 Asus routers into AP or Bridge mode as well. I don't even know if you can set redundant routing or fail over with those anyways. Asus routers might be able to mesh together to keep one SSID across both devices.

[–] PurpleNurpe@alien.top 1 points 11 months ago (2 children)

Thank you for this, unfortunately I’ve been at this the last 2 nights and it’s been nothing but stressful for me. I honestly don’t know why this isn’t working for me, my ISP router calls it “Bridge Port1” and my router calls it Bonding/Link-Aggregation and neither of them are willing to talk/work with each other, always fighting to assign LAN IP’s..

[–] poorlywrittenlife@alien.top 1 points 11 months ago

Also, here's some copy paste from forums I found on how to out your isp router into bridge mode, in case you truly need it for TV:

Select ADVANCED SETUP Select PROCEED at advanced user challenge screen Select WAN IP ADDRESSING under the IP ADDRESS section on the left-hand menu. In SECTION 2, Select RFC 1483 Transparent Bridging Select Apply to save any changes at bottom of screen. The "Internet" light on the front of the modem should go solid RED. This indicates the modem is in Bridge mode.

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