The MPLS WG Archive

[Yakov Rekhter <yakov@juniper.net>]

Neil,

> Yakov....I can understand why you hold this view but I have to disagree.
> 
> What about static LSPs?  And in theory one can set up LSPs using any
> signalling protocol you like....say PNNI....and in theory one does not need
> an IGP (IGPs don't dist labels).  

being practical kind of guy, I have no interest in theoretical arguments.

> If you also take your analogy further to
> GMPLS, then perhaps we should observe that SDH/Sonet never really existed
> until they were blessed with the IP-based control-elements?  

SDH/SONET certainly existed before GMPLS. But that has nothing to do
with the *fact* that GMPLS is a control plane that uses IP 
addressing/routing/signaling (and *not* PNNI).

> MPLS does create layer networks in the user-plane, GMPLS does not....these
> existed before.  

The discussion on whether MPLS does, or does not create layer networks,
seems to be of little/no practical significance. 

Yakov.


> 
> my regards, Neil
> 
> > -----Original Message-----
> > From: Yakov Rekhter [mailto:yakov@juniper.net]
> > Sent: 17 December 2001 17:17
> > To: Shahram Davari
> > Cc: 'mpls@UU.net'
> > Subject: Re: MPLSOAM BOF revised minutes 
> > 
> > 
> > Shahram,
> > 
> > > Hi All,
> > > 
> > > I have received two comments from George Swallow and Ben Mack-Crane,
> > > and corrected their comments accordingly. This is the revised
> > > minutes. Please let me know if further correction is needed.
> > 
> > see in-line...
> > 
> > [clipped...]
> > 
> > > Yakov - Ron's comments that there are two views - MPLS 
> > being a layered networ
> > > network - is not true. MPLS doesn't exist outside IP 
> > because it uses IP 
> > > routing and signaling.
> > 
> > What I said is that Ron's slides showed that there are two 
> > views on MPLS,
> > with one of these views saying that MPLS is a layer on its 
> > own. The point
> > I made is that this view doesn't match the reality, as in 
> > reality MPLS, and
> > specifically its control plane, doesn't exist outside IP because MPLS
> > control plane uses IP addressing, routing (OSPF, ISIS), and signaling
> > (RSVP-TE, LDP, CR-LDP).
> > 
> > Yakov.
> >