@MR.S Stand alone mode. Factory reset is something I wanted to avoid :- )

@MR.S I can see some interesting broadcast messages around the TCP resets/retransmissions. Not sure if this is related. 13:19:49.193496 00:14:78:00:00:ff (oui Unknown) > Broadcast, ethertype Unknown...

Yes I did. Using copper WAN/LAN4.

Actually I downgraded from 1.2.2 as I thought the problem is with the firmware :-) So the same issue with 1.2.2.

Hello, Since yesterday we have an unstable internet connectivity. The router is connected to an ISP modem which is in bridge mode. The router WAN port is receiving the WAN IP with DHCP. We face with...

Hi @Hank21 , It seems that was the missing bit. During the weekend I inspected the traffic with Wireshark and have seen that the devices are sending mDNS requests. I enabled the mDNS on the ER8411 GW...