Windows 10 clients can log on the ERL VPN but only one at a time. Is this a limit of ERL or a configuration error? Log off the first client and the second client can connect.
The L2TP server has four remote-access authentication local-users defined and a client-ip-pool containing 5 addresses, which I guessed should allow simultaneous logins.
However when a client is connected, a second client with a different user name is unable to login. Windows 10 error is: The network connection between your computer and the VPN server could not be established because the remote server is not responding . . .
