[160447] in North American Network Operators' Group
Re: Metro Ethernet, VPLS clarifications
daemon@ATHENA.MIT.EDU (Fabien Delmotte)
Wed Feb 6 10:09:44 2013
From: Fabien Delmotte <fdelmotte1@mac.com>
In-reply-to: <CAMrdfRxmA6KB97xtHJAAXr7x4G1-6FAPBM76FAKDQ4=jEXa2AA@mail.gmail.com>
Date: Wed, 06 Feb 2013 16:07:28 +0100
To: Scott Helms <khelms@zcorum.com>
Cc: NANOG <nanog@nanog.org>, Abzal Sembay <serian.reg@gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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 f=E9vr. 2013 =E0 15:41, Scott Helms <khelms@zcorum.com> a =E9crit :
>>=20
>> =46rom 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.
>>=20
>=20
> 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.
>=20
>=20
>=20
>> 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.
>>=20
>=20
> 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.
>=20
> Here are the main two RFCs:
>=20
> http://tools.ietf.org/html/rfc4761
> http://tools.ietf.org/html/rfc4762
>=20
>=20
>>=20
>>=20
>> --
>> Regards,
>>=20
>> Abzal
>>=20
>>=20
>=20
>=20
> --=20
> Scott Helms
> Vice President of Technology
> ZCorum
> (678) 507-5000
> --------------------------------
> http://twitter.com/kscotthelms
> --------------------------------
