Re: draft-ietf-l2vpn-evpn-07 L2 encapsulation?

["Rabadan, Jorge (Jorge)" <[e-mail]>]

Stefan,

The evpn draft is full of references to “Ethernet frames transported over
IP/MPLS”, which in my opinion, along with the description in section 6 and
other sections should be enough to clarify the stack.

Having said that, in the WG, we agreed to publish a evpn use-case draft
that could help clarify the main control plane and data plane concepts in
evpn:
http://tools.ietf.org/html/draft-rp-l2vpn-evpn-usage-02


What I would suggest is to use that draft as a way to clarify all those
things so that the evpn researcher/implementer can use it as a reference.
If you agree, please go through it and suggest any additions. We would be
happy to discuss and address them if possible.

Thanks.
Jorge

-----Original Message-----
From: Stefan Plug <[e-mail]>
Date: Wednesday, July 2, 2014 at 4:55 AM
To: "[e-mail]" <[e-mail]>
Subject: draft-ietf-l2vpn-evpn-07 L2 encapsulation?

>Hi all,
>
>In regards to draft-ietf-l2vpn-evpn-07:
>
>One thing is not clear to me from the draft, does the L2 frame get
>encapsulated by an MPLS tag as with Pseudo Wires, or does the L3 packet
>get encapsulated as with normal MPLS?
>
>I have got an answer that indeed the L2 frame in encapsulated, however I
>can find no reference to an RFC or details itself in this document where
>this is mentioned, to me therefore normal MPLS (RFC3031) applies and
>only the L3 packet is encapsulated.
>
>As this draft to my understanding proposes a replacement to VPLS I think
>it is necessary to mention or at least reference an RFC on how the
>entire L2 frame is to be encapsulated to avoid confusion.
>
>I would suggest a small part mentioning or referencing probably Pseudo
>Wires.
>
>Regards,
>
>Stefan Plug, Lutz Engels
>MSc Students
>System and Network Engineering (www.os3.nl)
>University of Amsterdam
>
>On 02-07-14 08:17, Henderickx, Wim (Wim) wrote:
>> The packet is encapsulated like a PW using the ETH frame in the MPLS PW.
>> 
>> On 02/07/14 02:08, "Stefan Plug" <[e-mail]> wrote:
>> 
>> Dear evpn gurus
>> 
>> I'm a Networking student at the University of Amsterdam researching
>> EVPN as a possible solution to the ARP flooding problem in IXPs.
>> 
>> One thing is not clear to me from the draft, does the L2 frame get
>> encapsulated by an MPLS tag as with Pseudo Wires, or does the L3
>> packet get encapsulated as with normal MPLS?
>> 
>> I cannot seem find any information on this in the draft?
>> 
>> In the case that normal MPLS rules apply and only the L3 packet is
>> encapsulated, what then happens to the source mac address at the end
>> of the tunnel?
>> 
>> I hope you can help me understand your protocol, it seems very
>> interesting!
>> 
>> Regards,
>> 
>> Stefan Plug
>> Student
>> System and Network Engineering (www.os3.nl)
>> University of Amsterdam
>> 
>