Multiple OpenWrt router (not Double-NAT) in same LAN network how properly disable DHCP on IPv6 in luci

Hello. I have multiple OpenWrt devices in one network. The usecase for this is having more then one WiFi AP's in the network to extend it.
The configuration of the network is simple.

  1. The main OpenWrt device is nearly fully default settings. Just set a WiFi password, changed the WiFi name and enabled WiFi interface. No other changes.
  2. All other OpenWrt WiFi AP's are connected with a LAN cable to the main OpenWrt router. On those i change the LAN IP to something else in 192.168.1.X (outside of the default OpenWrt DHCP range), configure the WiFi and disable DHCP by pressing in Luci a button named something like "ignore interface". WAN settings i simply remove and connect the LAN to LAN from main router (yes, wan port is then unusable and turned off instead of bridged to LAN but i dont need a additional LAN port so i dont care to configure something there).

All clients that connect to the additional AP's get from main router a IPv4 address and IPv4 works fine. But it looks like there is some race issue in IPv6. Some of the additional AP's seem to assign IPv6 to clients and list those in the main page overview. This is wrong. They should not do anything about DHCP. Thats why i configured in Luci DHCP should ignore the LAN interface. Why does it work as expected in IPv4 but does strange things in IPv6?

Would be nice if someone could show a Luci screenshot what have to be configured different.

In general i think when i say that DHCP should ignore the LAN interface, then it should not do different things in IPv4 and IPv6. Is this a known issue in case of usability when configuring OpenWrt?

You are using the additional devices as dumb APs, so on each device go to System->Startup and disable the dnsmasq, odhcpd and firewall services.

2 Likes

This topic was automatically closed 10 days after the last reply. New replies are no longer allowed.