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LC can hold only 20,000 ACTIVE routes., and ask central system
if it needs more., How many ACTIVE routes are used in any CORE
router?
0.1% or CORE? 2% of CORE?
Again, today it is not technical issue anymore.
----- Original Message -----
Sent: Saturday, July 09, 2005 1:02
AM
Subject: Re: OMB: IPv6 by June 2008
Christopher L. Morrow wrote:
randy already asked for a kibosh on the lunacy here... I agree, it'd be
nice, but...
On Fri, 8 Jul 2005, Alexei Roudnev wrote:
You do not need to - any router have only `1 - 10% of all routing table
active, and it is always possible to optimize these alghoritms.
and routing vendor's haven't already done some optomizing you think?
They sure have, let me explain a bit - Optimization here
can be is Route table optimization, forwarding table optimization and the
actual forwarding lookup paradigm.
But having the best and most opitmized
algorithm makes no difference if there is not enough memory on the Line Card,
having said that - 1G to 2G mem is something that is already supported by a
few vendors - on the Line cards and 2G and above on the Processors
(route processor..?)
On the other hand - what's wrong with 4Gb on line card in big core router?
oh, please please name the router vendor that has 4gb of 'ram'
(tcam/fpga/asic-'memory') on the 'linecard'. Oh, can't come up with one?
One wonders why that is? If the solution were as simple as: "Joe, add
1.21jigawatts of memory to the linecard so we can support +1M routes"
Don't you think the vendor would have done this to get people to stop
bitching at them?
Now, now, The RAM mentioned in terms of Gb should not
be thought, even inadvertently, to have something to do with TCAM/fpga/asic
-
Memory here can be divided in to 1. forwarding memory , 2. Line card CPU
memory, 3. TCAM memory (damn costly stuff )
And as for the number of
routes to be support -Right now venodrs do support close to 500K routes - ask
me to name the vendor (notice i did not say Vendors here) and i will be happy
to name.But, yes to do something like 1M routes - ahem mighty tricky stuff
aint it, but, does any one have 1M active routes in his table as of today
(notice how iam trying to evade commenting ;) you cant haul me for saying
this)
It's cheap enough, even today. And we have not 1,000,000 routes yet.
In YOUR network you don't... I'd venture to guess there are quite a few
very large networks with +1M routes in them today.
remember though, I'm the chemical engineer... and I was trained to MAKE
the crack cocaine...
1M routes, BGP is hope so - and not on a single box i
suppose so. come on, 1M + active routes- it sure would be a killing on
the box.
Chemical engineer you say, what a wonderfull world - Iam
a pharmacist- fully trained to give an anitdote to cocaine
addicts.
CIAO
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