i am searching for the best vpn-standart to realise a layer 2 vpn tunnel between 1 headstation and 2-3 substations.
Those substations a connectet redudand to the headstation and using ospf.
It should be much secure as possible and made no problems if the routing from ospf changes.
Layer3 VPN is likley no option.
I already played around with openvpn tap but i can't get it working correctly, the connection established but no traffic going trough the tunnel.
Thanks for your help!