Re: [LARTC] throttling individual dhcpd clients

[Stef Coene <stef.coene@docum.org>]

On Sunday 02 March 2003 22:21, Paul Evans wrote:
> I have 2 multipathed external links and one internal link which has dhcpd
> on it and is masqueraded.
>
> I have begun with ahu's script on the two external links and things look
> good there too.
>
> At this point I am only using the ingress policer on each external, but
> want to use a tbf (or recommendation) on the internal interface instead.
>
> The thing is, it is needed that each lease be given a certain amount of
> bandwidth with borrowing. I don't think there is any good way to do this
> other than building each of them their own qdisc.
You have to add a htb qdisc and 1 class.  That class holds all traffic leaving 
the box.  You also have to create 1 class for each dhcp client and put it's 
traffic in that class.

> I wonder if anyone has any tips one how to keep the rules in sync with the
> dynamic nature of the ip's? I suppose, one could just build for all
> possibilities. Also, I read somewhere that a script could be named
> dhcpd.exe which would run after each lease and thought that might be the
> way to go.
>
> Thoughts? I'd especially like to hear someone call me an idiot for thinking
> it would have to be that complicated...
You can create for each ip a class and put the traffic to that ip in it's own 
class.  If each dhcp client has the same bandwidth, you can create a set of 
static filter rules so each ip end up in it's class.  If you have different 
bandwidth requirements you have to update the filter rules so traffic for a 
pc always end in the same class.  I have no idea how you can trigger dhcpd to 
do this.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

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