I have no idea what you are trying to do with PPPoE.  From an L2 forwarding 
point of view, however, you need to put interfaces into the same bridge domain 
(BD) so they can forward packets to each other.  If you have only two 
interfaces to send packets to each other, you can L2 cross connect them instead 
of using a BD.   -John

From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of berk...@gmail.com
Sent: Tuesday, October 16, 2018 3:04 PM
To: vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] PPPoE plugin config #vpp #vpp

Switching to l2 mode with bridge-domain gives another trace, but anyway frame 
is not going to pppoe_cp_dispatch.

02:02:10:942877: tapcli-rx
  tapcli-0
02:02:10:942881: ethernet-input
  PPPOE_DISCOVERY: 2e:0d:e3:67:3e:bf -> 52:54:00:ea:ca:a5
02:02:10:942882: l2-input
  l2-input: sw_if_index 3 dst 52:54:00:ea:ca:a5 src 2e:0d:e3:67:3e:bf
02:02:10:942883: l2-learn
  l2-learn: sw_if_index 3 dst 52:54:00:ea:ca:a5 src 2e:0d:e3:67:3e:bf bd_index 1
02:02:10:942884: l2-fwd
  l2-fwd:   sw_if_index 3 dst 52:54:00:ea:ca:a5 src 2e:0d:e3:67:3e:bf bd_index 1
02:02:10:942885: l2-flood
  l2-flood: sw_if_index 3 dst 52:54:00:ea:ca:a5 src 2e:0d:e3:67:3e:bf bd_index 1
02:02:10:942885: error-drop
  l2-flood: L2 replication complete
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