Hi Marcel,
Welcome to the "party".
On the LAN interface, usually there is no need to configure Neighborhood.
Neighborhood should be configured on WAN interface, and on both routers (R1 and R2) WAN interfaces should use the same Neighborhood. Please don't add peers manually, as when you configure Neighborhood the peers will automatically be added. Initially, please don't change default configs (unless is mandatory) like Port-ranges.
After you configure the Neighborhood on both WAN interfaces the peering should become UP, meaning you have VPN connection established and the alarm will go away.
Until you plug something in the LAN interface or LAN interface is not Up, you will still see the alarm of LAN port down.
Hope this helps.
Regards,
Ivan
------------------------------
Ivan Stanev
------------------------------