Date: Mon, 23 May 2005 19:02:51 +0300 From: "Chris Dionissopoulos" <dionch@freemail.gr> To: <ovidiue@unixware.ro>, <freebsd-ipfw@freebsd.org> Subject: Re: QoS and guaranteed bandwidth Message-ID: <004901c55fb0$e1c93570$0100000a@R3B> References: <mailman.0.1116852154.15094.freebsd-ipfw@freebsd.org> <1116855133.4291db5d6eb55@webmail.unixware.ro>
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> Hello guys
>
> What is the best sollution (and also simple) to guarantee a bandwidth?
>
> For example if I have an 1024 kbps conection and i want to share
> this to 30 users and also guarantee 32 kbps to every user so if
> one of them is doing intense FTP the others to easely browse the
> net what should I use for that? I am looking for a solution like
> (and better then) HBT on Linux.
>
> I've googled for a while but there are not so many resources on that.
>
> Best Regards,
> ovidiu
> Hello guys
>
> What is the best sollution (and also simple) to guarantee a bandwidth?
>
> For example if I have an 1024 kbps conection and i want to share
> this to 30 users and also guarantee 32 kbps to every user so if
> one of them is doing intense FTP the others to easely browse the
> net what should I use for that? I am looking for a solution like
> (and better then) HBT on Linux.
>
> I've googled for a while but there are not so many resources on that.
>
> Best Regards,
> ovidiu
Hi,
you can use dummynet (man ipfw, man dummynet) to define the maximun
bandwidth and/or a WFQ priority for each user.
Theoriticaly by assign a proper WFQ priority to each user, you guarantee
the minimum {[User_Priority / Sum(user_priorities)] * Line_Bandwidth}
to each of them.
In your case:
Calculate your priority
~~~~~~~~~~~~~~~~~
The rule says that the priority in WFQ is calculated if you divide your total bandiwdth
with the minimum allocated bandwidth to each user. So we have:
WFQ_User_Priority = 1024Kbps / 32Kbps = 32
**This gives at least { 32 / (32 x 32 ) * 1024 } Kbps = 32Kbps to each user.
Assign to each user using ipfw pipes+queues
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A very simple ipfw configuration:
ipfw pipe 1 config bw 1024Kbit/s queue 20Kbytes
ipfw queue 1 weight 32 mask src-ip 0xffffffff queue 10kbytes
ipfw add queue 1 ip from $YOUR_LAN_NET to any xmit $WAN_INTERFACE
I hope that this helps you a little.
Chris.
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