Hi everyone,
I recently installed OpenWRT (openwrt-ar71xx-tiny-tl-wr841-v11-squashfs-factory.bin) on my TP-Link WR840N v11 router. I realize this firmware is meant for the TL-WR841 v11, but it installed successfully. However, I’m experiencing network issues, particularly with DHCP assigning duplicate IPs.
My Current Network Setup:
- ISP/Modem (Static IP) → Dumb Switch (No VLAN/LAGG support)
- The Dumb Switch connects to:
- Other users in the network
- OpenWRT router (TP-Link WR840N v11)
- OpenWRT Router connects to:
- OPNsense firewall
- Windows Server
The Problem:
- OpenWRT is assigning the same IP (e.g., 192.168.1.225) to multiple devices, causing conflicts.
- Devices connected to the OpenWRT WiFi or LAN/WAN ports are getting IPs from the same range as the main network, but DHCP is not handling them correctly.
- I suspect this is due to a misconfiguration in DHCP or an issue with the firmware compatibility.
What I Want to Achieve:
- The Windows Server should receive a DHCP IP from the main network (
192.168.1.x
) rather than OpenWRT assigning it separately. - OpenWRT should act as a bridge (Dumb AP) or DHCP relay rather than running its own DHCP server.
- All devices should be on the same subnet without conflicts.