[c-nsp] L2TPv3 vs. VPLS

[Bob Arthurs]

Another good one for L2VPNs  is Troubleshooting Virtual Private Networks. 
This is also by Cisco Press.

On the question of L2TPv3 versus VPLS, I think this question is a bit 
strange because there are now three VPLS drafts if I remember correctly. 
There's one that uses BGP for signalling the PWs (with MPLS encap for 
layer-2 frames), there's one that uses LDP for signalling the PWs (with MPLS 
encap for the l2 frames), and there's one that uses RADIUS for discovery and 
L2TPv3 for signalling and encap of l2 frames. I haven't heard of any vendor 
that has implemented the RADIUS/L2TPv3 draft, however.

I think it's not a choice between L2TPv3 and VPLS, but rather a choice 
between point to point and multipoint (VPLS/IPLS). Either of these models 
can use MPLS or L2TPv3 for encap.



>From: Önder Ergün (Probil-Ýstanbul)<onder.ergun at probil.com.tr>
>To: "Tantsura, Jeff" <jtantsura at ugceurope.com>,        "Vincent De Keyzer" 
><vincent at dekeyzer.net>,        <cisco-nsp at puck.nether.net>
>Subject: RE: [c-nsp] L2TPv3 vs. VPLS
>Date: Fri, 16 Sep 2005 15:09:19 +0300
>
>For those of you who are interested in Layer 2 VPN technologies, there is 
>an excellent book by Cisco Press, Layer 2 VPN Architectures ISBN: 
>1587051680
>
>
>Onder Ergun
>CCIE #14746
>
>-----Original Message-----
>From: cisco-nsp-bounces at puck.nether.net 
>[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Tantsura, Jeff
>Sent: Friday, September 16, 2005 12:17 PM
>To: 'Vincent De Keyzer'; cisco-nsp at puck.nether.net
>Subject: RE: [c-nsp] L2TPv3 vs. VPLS
>
>Vincent,
>
>If you don't need P2MP and don't have MPLS backbone in place don't even 
>consider VPLS, there are still some major limitations.
>I think either L2TPv3 on layer 3 or QinQ on layer 2 would be suitable for 
>you. In the past I used L2TPv3 between 2x10720 to transport 4Gb L2 traffic 
>between 2 IX's, worked just fine, the only issue we've had was MTU when 
>main
>STM16 ring went down and L2TP tunnel was rerouted via Ethernet links.
>
>Hope this helps,
>
>--
>Jeff Tantsura  CCIE# 11416
>Senior IP Network Engineer
>
>
>-----Original Message-----
>From: Vincent De Keyzer [mailto:vincent at dekeyzer.net]
>Sent: 16 September 2005 09:14
>To: cisco-nsp at puck.nether.net
>Subject: [c-nsp] L2TPv3 vs. VPLS
>
>Ok,
>
>thanks to Jeff I now have a clearer view of what is VPLS.
>
>I see that VPLS has one advantage over L2TP: it's a point-to-multipoint 
>technology (which we might not really need). But it also has one drawback:
>it requires building a MPLS backbone (which we don't have at the moment).
>
>Is this a correct analysis?
>
>Is anybody on this list using one of these two technologies to offer 
>Ethernet services over an IP backbone?
>
>Vincent
>
>
> > -----Original Message-----
> > From: Tantsura, Jeff [mailto:jtantsura at ugceurope.com]
> > Sent: jeudi 15 septembre 2005 14:18
> > To: 'Vincent De Keyzer'; cisco-nsp at puck.nether.net
> > Subject: RE: [c-nsp] AToM/L2TPv3/VPLS/etc.
> >
> > Vincent at all,
> >
> > Find attached VPLS presentation from MPLS World 2004 which explains
> > quit good what VPLS is and how it's different from other technologies.
> >
> > --
> > Jeff Tantsura  CCIE# 11416
> > Senior IP Network Engineer
> >
> >
> > -----Original Message-----
> > From: Vincent De Keyzer [mailto:vincent at dekeyzer.net]
> > Sent: 15 September 2005 13:12
> > To: cisco-nsp at puck.nether.net
> > Subject: [c-nsp] AToM/L2TPv3/VPLS/etc.
> >
> > Hello list,
> >
> >
> >
> > I work for a company offering Internet access and LAN-to-LAN services
> > over its own wireless network. Currently, we have an IP network over
> > ATM, but would like to get rid of ATM. Luckily, there is some money
> > available today.
> >
> >
> >
> > All our routers are Cisco (7206VXRs installed, 7600s budgeted). We
> > want to offer Internet access with speeds from 1 to 34 Mbps (for a
> > total of about 300 Mbps of transit capacity), and Ethernet services
> > with speeds of 1 to 100 Mbps.
> >
> >
> >
> > I have heard about AToM, L2TPv3, VPLS; but have very little
> > understanding of those. I am wondering where to start to select the
> > technology. So I would be very glad to read any ideas, pointers to
> > good (high-level) documents, or real-life experiences that could help
> > me with this (challenging to me) project.
> >
> >
> >
> > Thanks in advance,
> >
> >
> >
> > Vincent
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
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>
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