[cisco-nas] IP CEF Problem

[Gert Doering]

Hi,

On Sat, Jan 24, 2004 at 08:25:13PM +0800, Rommel Y. Catabian wrote:
> Actually, we need to rate-limit (or traffic shape) both input and output on
> the interface connected to our Uplink provider. We do not want to go beyond
> our subscribed BW as we will be charged for the excess BW used.
> 
> How do I shape the input traffic? What's the command.

Input shaping (or rate limiting) is "difficult".  Imagine someone 
sending a 10Mbit/s.-Burst towards you, to cause monetary damage.

Whatever you do on your router to stop that: it has already been sent
out your provider's interface, and thus the damage has been done.

For "normal" traffic, input rate limiting will have some effect (due
to TCP connections noticing packet drops and slowing down) but it's
a tricky thing.  You would achieve that with the "rate-limit input"
command.  Input traffic shaping is not available on Cisco hardware.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de