[c-nsp] 2811 performance on an Ethernet over SONET connection??

[Joe Freeman]

I've not tried traffic shaping on the connection. The EoS connection has 11
VT1.5's, which should be a hard limit of about 16.8Mbps. I've verified the
duplex/speed settings all the way through the network.

All of our testing is TCP based, and I know the 2811 doesn't support flow
control, which I would think really help here.

If I use traffic shaping instead of policing, can I simply set the CIR, and
not set Be?

Joe

On 2/16/08, Brad Henshaw <brad.henshaw at qcn.com.au> wrote:
>
>  Joe Freeman wrote:
>
> > I tried both straight rate-limiting and traffic policing with no change
> in
> > symptoms.
>
>  Did you try a policy map with 'shape average' or 'shape peak', attached
> in the out direction on Fa0/0? You might need to subtract from the 15Mbps
> rate to account for any container mapping overhead (depending on how
> you define your 15Mbps). Policing obviously won't be friendly to TCP, but
> this is irrelevant if you tested using UDP.
> Also - bear in mind that shaping will chew through CPU usage on a 2811, so
> keep an eye on that. You should be fine with 15Mbps if they're not enabling
> too many other fancy features (e.g. zone based firewall/CBAC).
>
> It'd also be worth double/triple-checking duplex setting/negotiation
> between his 2811 and your terminal/mux.
>
> Regards,
> Brad
>