RE: CIsco 7206VXR w/NPE-G1 Question

[alex () pilosoft com]

Keep in mind, 72xx is still flow-based, so you need to count *both* shared 
fabric capacity (aka PCI buses) and capacity of NPE to establish flows 
(aka pps rate).

NPE-G1 might probably route 3*GE, without any services and if all 3GE are 
in a single flow, but will melt down at a face of one-packet-per-flow DDoS 
(read: "Nachi" worm) at a far lower rate (I'd be surprised if it sustains 
200kpps DDoS traffic, which can be as low as 150Mbit bandwidth). 

That is of course, as opposed to Juniper, which is truly line-rate at any
interface, with any services, at any composition of traffic.

-alex

On Fri, 30 Jan 2004 Jack.W.Parks () alltel com wrote:

> Does anyone have definitive speed results on the 3 "built-in" Gig ports
> on the NPE-G1?  I know that they aren't attached to the PCI Buses, and
> don't consume bandwidth points, but all of that is mute.  Can all three
> of the ports do line rate Gig?  The Gig PA is limited to 400Mbps.  I
> have seen posts that allude to the fact the max throughput on the 3 Gigs
> are 800Mbps.  It's is like a big mystery that cannot be solved.  With a
> "J" M7i, I know I'm going to get line rate per port up to the total
> forwarding capacity of the FPC.
>
> We are trying to create a comparison matrix and any info you have would
> be great.
>
> Jack
>
>
> -----Original Message-----
> From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of
> Simon Hamilton-Wilkes
> Sent: Friday, January 30, 2004 9:36 AM
> To: nanog () merit edu
> Subject: RE: CIsco 7206VXR w/NPE-G1 Question
>
>
>
> One more interesting feature - if you need a 4th GigE port, you can add
> the GigE I/O card which still uses none of the bus bandwidth points.
> The buses are fine for OC3 and below...
>
>
> Simon
>
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