[c-nsp] 7604/sup32 (minor correction) - TCAM route aggregation

[Gert Doering]

Hi,

On Wed, Jan 09, 2008 at 11:53:23AM +0100, Nicolas DEFFAYET wrote:
> > On Wed, Jan 09, 2008 at 09:59:21AM +0100, Mohacsi Janos wrote:
> > > We are using Sup32 with  12.2(18)SXF11 for more than 2.5 months without a 
> > > problem (Earlier we used 12.2(18)SXF10) - of course without full routing 
> > > table....
> > 
> > Have you been hit by "more prefixes in the RIB than would fit into TCAM"?
> 
> Hum, why Cisco don't create a software feature for be able to store
> aggragated routes in the TCAM ?

Such algorithms exist (usually you can compress FIB much better than 
just plain aggregation of adjacent prefixes, given that most routers
have only a handful of diverse next-hops), but if Cisco would implement
that, customers have no need to buy XL hardware.

So business dictates "spend $$$ so customers will NOT spend $$$" = "bad idea".

(Technically, it's non-trivial, so it would take a while to shake down
bugs, and customers wouldn't like that either, of course).

gert
-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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