RB260gs PPPOE question

Hi,

We have a lot of RB750 that is active as a PPPOE client and a RB1100 that is running as the PPPOE server that is using a external radius server in a estate.

We want to replace all the RB750 in the estate with one RB1100 to be the client RB and the other RB1100 will still be the PPPOE server.

Then we want to use the RB260gs with the SFP to link back to our fiber switch. My question is how can I let the RB1100 client router that has the PPPOE account on go active when I connect it to the RB260GS. If there away to do this or not. Make sens?

Thank you

I plugged yesterday RB260G with SFP module and I no longer work sessions PPPoE, please help.