Rate Limiting on Cisco Router

Thu Jul 8 23:35:24 UTC 2010

I think if you try to traffic-shape 80Mbps on that platform you'll have
problems.  We have a 7200 with NPE-G1 (rate limited at 80Mbps) and it killed
the CPU when the threshold was hit.  I imagine that traffic-shaping would do
the same to CPU and memory.  I'd lab it first.

Kenny

On Thu, Jul 8, 2010 at 3:43 PM, Murphy, Jay, DOH <Jay.Murphy at state.nm.us>wrote:

> traffic-shape rate 75000000 90000000 90000000 1000 for example. Your rate
> limit will police your traffic and drop it all.
>
> Traffic shaping produces a queue, and does not completely junk a packet. It
> becomes q'd, and produces a smoother output.
>
> ~Jay Murphy
> IP Network Specialist
> NM State Government
>
> IT Services Division
> PSB – IP Network Management Center
> Santa Fé, New México 87505
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> -----Original Message-----
> From: Antonio Querubin [mailto:tony at lava.net]
> Sent: Thursday, July 08, 2010 4:26 PM
> To: Alan Bryant
> Cc: nanog at nanog.org
> Subject: Re: Rate Limiting on Cisco Router
>
> On Thu, 8 Jul 2010, Alan Bryant wrote:
>
> > The problem we have now is that we are only paying for 80 MB/s of the
> > OC-3, and the ISP is leaving the capping of it up to us. I have
>
> BTW, rate-limiting of traffic that the ISP router sends to your router is
> best done at the ISP router.
>
> Antonio Querubin
> 808-545-5282 x3003
> e-mail/xmpp:  tony at lava.net
>
>
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