Re: Metro Ethernet, VPLS clarifications

[Fabien Delmotte <fdelmotte1 () mac com>]

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 () 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
> --------------------------------