The MPLS WG Archive

["LE ROUX Jean-Louis RD-CORE-LAN" <jeanlouis.leroux@orange-ftgroup.com>]

Hi George,

Yes, as pointed out by Ina, the main goal is not to reduce spf time, but rather to avoid overloading the IGP with reachability info.

Advertising all /32 prefixes significantly diminishes the 
benefits of deploying a multi-area IGP.

Best Regards,

JL

 

> -----Message d'origine-----
> De : Ina Minei [mailto:ina@juniper.net] 
> Envoyé : jeudi 24 mai 2007 18:13
> À : George Swallow
> Cc : mpls@ietf.org
> Objet : Re: [mpls] poll on 
> draft-decraene-mpls-ldp-interarea-04.txt as wgdocument 
> 
> 
>  	George,
> 
>  	The main reason for this was to avoid leaking PE 
> loopback addresses across areas. This reduces the state 
> maintained in the IGP.
> 
>  				Ina
> 
> On Thu, 24 May 2007, George Swallow wrote:
> 
> > [Chair hat off]
> >
> > I still believe that this won't drastically reduce state or 
> processing.
> > One of the points in support of this was reduction of 
> compute time for 
> > dijkstas.  Much of this could be gotten by noting what prefixes are 
> > advertised by the set of ABRs and caching the result of 
> just one.  (If 
> > implementations aren't already doing this).
> >
> > I remain unenthusiastic.
> >
> > ...George
> >
> > 
> ==============================================================
> ==========
> > George Swallow             Cisco Systems                  
> (978) 936-1398
> >                           1414 Massachusetts Avenue
> >                           Boxborough, MA 01719
> >
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