[c-nsp] access-list speed limiting.

[Mike Louis]

I had this problem with policing using the standard MQC in 3550s. I had to adjust the burst size until I got the speed that I wanted. Burst size greatly affects overall throughput you can achieve. You need to figure out your throughput, say 3000000 and divide that by your policing interval, can't recall what it is for CAR but lets say its 1/100, and you get 30000 bits per interval. You may have to convert that to bytes so divide by 8 and you get your burst size for that data rate.

HTH

mike

CCO has some write ups on policing and intervals. Do a search for "leaky bucket".


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Lincoln Dale
Sent: Monday, May 19, 2008 7:23 AM
To: Richey
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] access-list speed limiting.



Richey wrote:
> I am trying to limit them to 3Mb down 3Mb up.    When I am testing I am
> seeing full speed both directions.  I did have some success by changing my
> access-list 150 permit ip host x.x.10.71 any to access-list 150 permit ip
> any host x.x.10.71
you will need BOTH of the above if you want to enforce both directions.
>  but I end up with about 1Mb of traffic instead of 3Mb.
>
that is about right.
policing compared to shaping, see
http://www.cisco.com/warp/public/105/policevsshape.html



cheers,

lincoln.
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