Re: Cost per prefix [was: request for help w/ ATT and terminology]

[David Barak <thegameiam () yahoo com>]

Wouldn't a reasonable approach be to take the sum of a 6500/msfc2 and a 2851, and assume that the routing 
computation could be offloaded?

The difficulty I have with this discussion is that the cost per prefix is zero until you need to change eigenstate, 
where there's a big cost, and then it goes back to zero again. 

Because this isn't really all that new a problem, most vendors try not to make devices which have no headroom at 
all - so kit in the lower category seems to be qualitatively different.
-David

Joe Greco wrote: 
> > On Mon, 21 Jan 2008, Joe Greco wrote:
> > > Given that the 3750 is not acceptable, then what exactly would you propose
> > > for a 48 port multigigabit router, capable of wirespeed, that does /not/
> > > hold a 300K+ prefix table?  All we need is a model number and a price, and
> > > then we can substitute it into the pricing questions previously posed.
> > >
> > > If you disagree that the 7600/3bxl is a good choice for the fully-capable
> > > router, feel free to change that too.  I don't really care, I just want to
> > > see the cost difference between DFZ-capable and non-DFZ-capable on stuff
> > > that have similar features in other ways.
> >
> > If using the 7600/3bxl as the cost basis of "the upgrade", you might as 
> > well compare it to the 6500/7600/sup2 or sup3b.  Either of these would 
> > likely be what people buying the 3bxls are upgrading from, in some cases 
> > just because of DFZ growth/bloat, in others, to get additional features 
> > (IPv6).
> I see a minor problem with that in that if I don't actually need a chassis
> as large as the 6500/sup2, there's a bit of a hefty jump to get to that
> platform from potentially reasonable lesser platforms.  If you're upgrading,
> though, it's essentially a discard of the sup2 (because you lose access to
> the chassis), so it may be fair to count the entire cost of the sup720-3bxl.
> Punching in 720-3bxl to Froogle comes up with $29K.  Since there are other
> costs that may be associated with the upgrade (daughterboards, incompatible
> line cards, etc), let's just pretend $30K is a reasonable figure, unless
> someone else has Figures To Share.
> ... JG
> -- 
> Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net
> "We call it the 'one bite at the apple' rule. Give me one chance [and] then I
> won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CNN)
> With 24 million small businesses in the US alone, that's way too many apples.



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