The MPLS WG Archive

[Giles Heron <giles@packetexchange.net>]

On Fri, 2002-05-31 at 17:41, Shahram Davari wrote:
> Giles,
> 
> > -----Original Message-----
> > From: Giles Heron [mailto:giles@packetexchange.net]
> > Sent: Friday, May 31, 2002 2:37 PM
> > To: Shahram Davari
> > Cc: 'mpls@uu.net'; 'ppvpn@ppvpn.francetelecom.com'
> > Subject: Re: Basic LDP Question
> > 
> > 
> > 1.  Efficient encapsulation of VPN traffic
> 
> Do you mean the difference between 4 bytes label and 20 bytes IP header?

yes.

> > 2.  Ability to run VPN on current hardware
> 
> But current hardware have IP already, it is much easier to run
> IP rather than LDP MPLS. isn't it?

don't think so.  I believe many current routers with MPLS support can
push multiple labels when sending a packet, but can't "push" an extra IP
header?

Giles
 
> -Shahram
> 
> > 
> > There are probably other reasons as well...
> > 
> > On Fri, 2002-05-31 at 17:28, Shahram Davari wrote:
> > > Hi,
> > > 
> > > What problem a mp2p LDP-based MPLS network is trying to 
> > solve (like the one used in RFC2547) that can't be done with 
> > pure IP forwarding?
> > > 
> > > Note: Don't tell me fast forwarding, because we can do fast 
> > IP lookup as well.
> > > 
> > > Yours,
> > > Shahram
> > > 
> > > 
> > -- 
> > =================================================================
> > Giles Heron    Principal Network Architect    PacketExchange Ltd.
> > ph: +44 7880 506185              "if you build it they will yawn"
> > =================================================================
> > 
> 
-- 
=================================================================
Giles Heron    Principal Network Architect    PacketExchange Ltd.
ph: +44 7880 506185              "if you build it they will yawn"
=================================================================