PPPoE sniffing

[dork_4love () yahoo com]

Greetings,
I am working in cooperate with friend running an ISP ,my friend
 installed PPPoE ,by that he says that it will be immune to package sniffingQ
-My question:
--Is it possible to run the usual arp spoofing ,sniffing,ssl mitm on
 PPPoE installed networks?
--And if that feasible does ettercap is capable of doing such duty? or
 there are other tools to test that?

Regards,
Bernard