I apologize for getting back to this thread so late.
The PPPoE can be debugged using the following:
debug pppoe events
debug pppoe packets
Also, I would strongly advise you to read the RFC 2516 where the PPPoE is codified. The whole RFC has less than 18 pages and is easily readable. This document is the key to understanding what is inside the PPPoE.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...