FreeBSD Traffic Shaping

freebsd at freebsd at
Wed Apr 2 12:21:41 UTC 2008

I think you guys went a bit on a tangent here. What I am trying to do  
is limit the outbound bandwidth of my services and this should be  
perfectly possible as I control the output.

Also, the reason for this need is that some services use  
burst-bandwidth and I have many peaks and lows throughout the day.  
This means that my carrier who bills me by the 95th percentile is  
having a field day. For the services that my server offers it's not  
imperative that they get rid of the client in 1 second instead of 5  
for example. In this sense, stretching out 1MB of traffic over 10  
seconds is more beneficial towards my 95th than if I stretch it over 2  
seconds for example.

Quoting Mel <fbsd.questions at>:

> On Wednesday 02 April 2008 09:27:21 freebsd at wrote:
>> I gave port 80 as an example but I need this configuration for
>> limiting other services as well.
>> If you have a 100mbps connection and only one client, you want him to
>> only use 50kbps, not the full pipe. If you have 200 clients, they
>> still get 50kbps each.
>> Is this feature that I need so complicated that it can't be
>> implemented easily into FreeBSD or is it that not many people need it
>> ? It sounds quite useful to me :)
> It isn't as useful as you think. I can easily generate 200 clients being only
> one person. That's why the focus in bandwidth shapers lies on the type of
> traffic and the origin/destination rather then the state and they divide the
> bandwidth within those pipes between the states.
> Secondly - bit besides the point, but not many people think about it - if you
> have 100% available and limit a single person to 5%, you're more likely to
> end up at the 100%, simply because it takes more time for that person to get
> what he wants.
> So if there's no financial/legal issues involved, it's better to get rid of
> the clients as fast as possible.
> --
> Mel
> Problem with today's modular software: they start with the modules
>     and never get to the software part.
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