[c-nsp] 2811 usage scenario

[Dave Temkin]

>From my testing, I got 600Mbps bidirectional (300Mbps each way at the same
time) of UDP traffic through the box at packet sizes around 500.  This is
far above what the box is rated at, so I'd imagine you'd be fine.  A 3640
would fall over well before hitting 50Mbps.

-Dave

On Fri, 12 Nov 2004, Mike Byrne wrote:

>
> Hi all,
>
> I'm looking at possibly replacing an existing 3640 with a 2811.
>
> We use the 3640 for FE-FE (NM-2FE-2W) and FE-ATM (NM-1A-T3) routing, and
> while the 3800 series seems like more of an upgrade, the 2811 seems like
> it should do what we need.
>
> The reason we're looking for a replacement, though, is because the CPU on
> the 3640 gets maxxed out occasionally (bridge traffic across ATM PVCs).
> The usage is almost all interrupt-driven, and we're maxxing out at about
> 10mbps on the DS3 now before the CPU is at 100%.
>
> So the question is if the 2811 (or 2821?) can do better.  We need the
> bridging (irb) and can't switch to rbe anytime soon.  I'd like something
> that can do 20-25mbps on the T3 to hold us over for a while.  Is this
> realistic with the 2800 series?
>
> Going by the published kpps ratings for the 3640 and the 2811 it seems
> like a huge improvement, but without any published process switched kpps
> ratings it's very hard to tell.
>
> Thanks for any input...
>
> - Mike
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