When I disabled Isolate Clients on the web, but it still enabled "ap_isolate=1" in the var/run/hostapd-phy0.conf file, and found that it was related to multicast_to_unicast. Openwrt enabled multicast_to_unicast by default, which caused isolate to be enabled by default, but I How to disabled isolate?
Can you provide more details regarding this. Official OpenWrt firmware from downloads.openwrt.org doesn't do this. Did you install a package related to this?
Can you provide details/screenshots on how you determined this?
I assume you already checked this and restarted WiFi afterward, correct?
I've checked this and restarted wifi, but ap_isolate is still enabled in /var/run/hostapd-phy0.conf
You should probably read this first:
https://forum.openwrt.org/t/clients-in-same-wlan-cant-reach-each-other/2501/ - #22 by skids
If you still want to do this, add option multicast_to_unicast='0' to the corresponding bridge device section in /etc/config/network (no LuCI option).
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