The MPLS WG Archive

[Shahram Davari <Shahram_Davari@pmc-sierra.com>]

> 
> If MPLS over IP is used, how can the overlapping VPN IP 
> address be handled..

By the MPLS label above IP.

> In case of multiple labels, the label would distinguish the 
> overlapping
> address spaced packets correctly , isn't it?

No.

-Shahram

> 
> Ananth
> 
> -----Original Message-----
> From: Shahram Davari [mailto:Shahram_Davari@pmc-sierra.com]
> Sent: Friday, May 31, 2002 1:48 PM
> To: 'Suryanarayana, Ananth'; 'mpls@uu.net'
> Cc: 'ppvpn@ppvpn.francetelecom.com'
> Subject: RE: Basic LDP Question
> 
> 
> 1) My question was explicitly related to LDP which can't do 
> source-routing.
> 2) I was thinking of MPLS over IP not IP over IP.
> 
> -Shahram
> 
> > -----Original Message-----
> > From: Suryanarayana, Ananth [mailto:ananth@celoxnetworks.com]
> > Sent: Friday, May 31, 2002 1:43 PM
> > To: Shahram Davari; 'mpls@uu.net'
> > Cc: 'ppvpn@ppvpn.francetelecom.com'
> > Subject: RE: Basic LDP Question
> > 
> > 
> > traditional IP forwarding is a hopbyhop basis and hence 
> very difficult
> > manage the path taken by a packet (end-too-end)... I think 
> > MPLS is like
> > source-routing, but with much more control over the packet 
> > flow.. and one of
> > the other uses is for seting up vpns using multiple label 
> > header stacks,
> > which is much more simple and efficient then maintaining IP over IP
> > tunnels..
> > 
> > Ananth
> > 
> > 
> > 
> > -----Original Message-----
> > From: Shahram Davari [mailto:Shahram_Davari@pmc-sierra.com]
> > Sent: Friday, May 31, 2002 1:28 PM
> > To: 'mpls@uu.net'
> > Cc: 'ppvpn@ppvpn.francetelecom.com'
> > Subject: Basic LDP Question
> > 
> > 
> > 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
> > 
>