Hi, i have a problem with user manager.
I have user manager installed in a Router, let's call it A, and there are a lot of routers that provide service with PPPoE.
The routers asks router A to authenticate the users instead of using local secrets. I could make the system work but i have a big problem. It doesn't work if in the routers that ask for authentication i don't select an IP adress of the physical interface where the router A answers.
This is a problem because i have a redundant network running OSPF, and if the interface which have the IP that i configure goes down i could be reaching the router but the radius server would be pointing to the ip of the down interface. I want to select a loopback interface of router A in the routers but it doesn't work.
What i could see is that the routers asks to the IP of the loopback interface of the router A and router A answers but from the ip of the physical interface where the packet is going out. When this packet arrives to the router who made the request, it drop it because it comes from another IP.