Sat Nov 05, 2022 10:43 am
You can have as many PPPoE servers as you want in the same L2 broadcast domain.
If you configure the client to request an offer for a particular service name, it will indicate this service name in its PADI, and only servers configured with that particular service name will respond. If you configure no service name at the client, its PADI will not indicate any service name and thus all servers will respond, regardless the service name configured at their side.
Even servers that use the same service name will back up each other and work the way @mkx has described - all of them respond to client's PADI with a different delay, and the client chooses one of them so the load spreads across all available servers (typically, the delay of the response is proportional o the current load of the server).