i had wondered about the network port on the 11 laptop but i have a 3rd laptop again with windows 11 on it and get the same result - so its really too much to think they are both faulty - the cable is [obviously] another thing that could be faulty but the same cable is fine on the win 10 setup
so the common thing is windows 11 on the 2 laptops
after reset the ip is 192.168.1.1 and DHCP is enabled i see that on the windows 10 setup - network port to lan port on router with no other connection - on the 11 computer i cannot access the UI - not tried to ping it and have not changed the computer network settings - thats to look at
but thinking about it i am more confused - allowing for the fact the win11 laptop will not see the router after a reset - it will not see it after it has been set up to access point mode via the win10 setup
to clarify - connect router to win10 laptop - set up wifi ssid and passwords - turn off dhdp and change its internal address to 192.168.0.81 - save at each stage and finally reboot hub - in win10 laptop type 192.168.0.81 in browser - edge - vivaldi - firefox and i get to log in screen - login and i am in UI
move router to win11 laptop and type 192.168.0.81 and i cannot connect - wifi at this moment is turned off on laptop - disconnect lan cable - turn on wifi and i can log into UI - so its the cable connection when i am on windows 11 - its not the port as i can repeat it on 2 different laptops and if i connect either laptop via a cable to my existing network i connect to the internet thus proving the network port and cable are good