The MPLS-OPS Archive

[Yakov Rekhter <yakov@juniper.net>]

> >From my point of view, the kompella draft that Juniper follows is 
> basically an extension to what Martini does. Martini defines both the 
> encapsulation mechanisms and the signalling mechanisms for providing 
> point to point services over MPLS for different technologies, ethernet, 
> ATM, Frame Relay, PPP, ... But in real cases, specially for Frame Relay 
> and ATM, a real customer service is formed by many point to point 
> connections. So what Kompella does is provide a control plane based on 
> MP-BGP in order to simplify the signalling and provisioning of a VPN of 
> n sites, setting up automatically the nx(n-1) point to point circuits 
> automatically. With Martini you would need to create them manually or 
> using a provisioning tool able to do it for you.
> 
> On the other hand, for Ethernet technologies, Kompella still provides a 
> point-to-point service. Here is where Lasserre-vKompella comes, 
> providing a real multipoint service between n sites (that means MAC 
> learning, and many other considerations). 

It is certainly correct that draft-kompella-ppvpn-l2vpn-02.txt
provides just a point-to-point Ethernet service. However,
draft-kompella-ppvpn-vpls-01.txt provides VPLS (a multipoint
service).  And it is build on top of the mechanisms defined in
draft-kompella-ppvpn-l2vpn-02.txt.

> I think each draft has its applications. Regarding whether LDP is 
> better than MP-BGP for signalling or not. I do not know, probably both 
> have some pros and cons.

If one uses BGP for autodiscovery, then I've yet to see any convincing
*technical* arguments why LDP for signaling is any better than BGP.
In other words, why BGP for autodiscovery + LDP for signaling
would be any better than BGP for both autodiscovery and signaling.

Yakov.

> 
> Regards,
> 
> ----- Mensaje Original -----
> Remitente: "Hamid Ould-Brahim" <hbrahim@nortelnetworks.com>
> Fecha: Sabado, Noviembre 16, 2002 0:35 am
> Asunto: RE: [MPLS-OPS]: MPLS/VPLS Vendors
> 
> > I think you touched on a point where there is still
> > a lot of confusion.
> > 
> > Martini-l2 circuit is a layer 2 service that emulates
> > a point to point layer-2 circuit over an MPLS network 
> > whereas l2vpn-kompella (and some other proposals in this space) 
> > is a vpn service that connects multiple customer sites 
> > (member of the same vpn) in a given layer-2 topology
> > across an IP/MPLS provider network. 
> > 
> > The two types of services are different and their
> > problem and solution spaces are different as well 
> > (even if most of l2vpns share some common building blocks 
> > such as martini encapsulation).
> > 
> > So it may not be appropriate to compare l2-martini with
> > l2vpn-kompella from a service, solution, and implementation 
> > point of view since they are not solving exactly the 
> > same problem.
> > 
> > My 2 cents...
> > 
> > Hamid.
> > 
> > > 
> > > 
> > > From the various conversation I have gathered in the past with 
> > different> people.
> > > 
> > > L2-Kompella is more complicated to implement than l2-martini.
> > > 
> > > Cisco is aligned with martini, you can't be wrong if you side with
> > > cisco.
> > > 
> > > The choices has nothing to do with what draft is superior...
> > > 
> > > -----Original Message-----
> > > From: alok [mailto:alok.dube@apara.com] 
> > Sent: Friday, November 15, 2002 11:07 AM
> > > To: Abe B. Chimpzi; mpls-ops@mplsrc.com
> > > Subject: Re: [MPLS-OPS]: MPLS/VPLS Vendors
> > > 
> > > why is draft martini preferred over the other one?
> > > 
> > > im just curious...can someone please explain the same?
> > > 
> > > ----- Original Message -----
> > > From: Abe B. Chimpzi <ChimpzAreUs@netscape.net>
> > > To: <mpls-ops@mplsrc.com>
> > > Sent: Saturday, November 16, 2002 12:05 AM
> > > Subject: Re: [MPLS-OPS]: MPLS/VPLS Vendors
> > > 
> > > 
> > > > Hello,
> > > >
> > > > According to
> > > http://www.laurelnetworks.com/newsEvents/release60302.html,
> > > > Laurel Networks also supports draft Martini (Etherne> >
> > > > Level3 is deploying their platforms, but has anybody else have any
> > > > working experience with the box?
> > > >
> > > > Regards,
> > > > Abe.
> > > >
> > > >
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