What card does the server choose for PPPoE?

Question

Network administration

Server 2008R2 has two network cards. At startup, PPPoE is connected by Kerio Control.
Errors occur intermittently ("This connection has already been made" or "The modem or other communication device reported an error").
It is treated by disconnecting the LAN card and starting PPPoE without it.
Tried to change cards (LAN to WAN), did not help.
Where in the settings to register through which card to raise the Internet?

Answer 1

If you have PPPoE using Kerio tools, then here in the manual: kb.kerio.com/product/kerio-control/interfaces/conf... it
is indicated that in the PPPoE settings there is a certain Dialing Settings tab, on which you can allegedly select outgoing interface.