Metro Ethernet, VPLS clarifications

Wed Feb 6 16:21:40 UTC 2013

I thought that PBB was dead :)
if not forget VPLS and play with PBB and PBT :)

Welcome in the "twilight zone"

Fabien

Le 6 févr. 2013 à 16:19, Adam Vitkovsky <adam.vitkovsky at swan.sk> a écrit :

> And for fun you can also do:
> Ethernet over PBB to VPLS
> Ethernet over PBB over VPLS -that's actually called EVPN
> 
> adam
> -----Original Message-----
> From: Fabien Delmotte [mailto:fdelmotte1 at mac.com] 
> Sent: Wednesday, February 06, 2013 4:07 PM
> To: Scott Helms
> Cc: NANOG; Abzal Sembay
> Subject: Re: Metro Ethernet, VPLS clarifications
> 
> Hi,
> 
> My 2 cents
> 
>> VPLS can be run across several different kinds of layer 1 & 2 
>> technologies and is independent of the underlying technology because 
>> it builds it pseudo wires at layers 3 & 4. VPLS leverages technologies 
>> like Metro Ethernet and MPLS to extend a business' Ethernet LAN 
>> (technically the broadcast domain) to remote sites.  At the end of the 
>> day you can use several kinds of tunneling technologies to provide VPLS,
> including GRE, MPLS, and L2TPv3.
> 
> For fun you can also do :
> 	LDP VPLS over a GRE tunnel
> 	LDP over a GRE tunnel within an encrypted network
> 
> I can be wrong but VPLS is running over MPLS (rfc 4762) because it is using
> LDP
> 
> Regards
> 
> Fabien
> 
> 
> 
> Le 6 févr. 2013 à 15:41, Scott Helms <khelms at zcorum.com> a écrit :
> 
>>> 
>>> From my understanding M-Ethernet is a some kind of service. 
>>> Standartized technology that allows to connect multiple different 
>>> networks.  And it is independent from physical and datalink layers.
>>> 
>> 
>> Metro Ethernet is a datalink (layer 2) protocol.  It also has physical 
>> (layer 1) specifications though there are several kinds of physical 
>> medium that can be used.  Most commonly its delivered over fiber 
>> (single or multi-mode depending on distance from the last active 
>> element) or cat 5E/6 twisted pair.
>> 
>> 
>> 
>>> And nowadays which tecnology is the most used(VPLS or Metro)? What 
>>> about MPLS? Sorry I'm a little confused. I really want to understand.
>>> 
>> 
>> VPLS can be run across several different kinds of layer 1 & 2 
>> technologies and is independent of the underlying technology because 
>> it builds it pseudo wires at layers 3 & 4. VPLS leverages technologies 
>> like Metro Ethernet and MPLS to extend a business' Ethernet LAN 
>> (technically the broadcast domain) to remote sites.  At the end of the 
>> day you can use several kinds of tunneling technologies to provide VPLS,
> including GRE, MPLS, and L2TPv3.
>> 
>> Here are the main two RFCs:
>> 
>> http://tools.ietf.org/html/rfc4761
>> http://tools.ietf.org/html/rfc4762
>> 
>> 
>>> 
>>> 
>>> --
>>> Regards,
>>> 
>>> Abzal
>>> 
>>> 
>> 
>> 
>> --
>> Scott Helms
>> Vice President of Technology
>> ZCorum
>> (678) 507-5000
>> --------------------------------
>> http://twitter.com/kscotthelms
>> --------------------------------
> 
> 
> 