Re: How can I test my tc script?

[Andrew Beverley <andy@andybev.com>]

On Sun, 2011-02-06 at 12:28 -0400, Optimum Wireless Services wrote:
> On Sun, 2011-02-06 at 15:54 +0000, Andrew Beverley wrote:
> > > Just wondering, I have a total of 15Mbps for our total bandwidth. If I
> > > devide that into 512kbps then I can only have about 29 users at that
> > > rate.
> > 
> > You could use HTB's "ceil" parameter for each leaf class to specify the
> > max rate per user - that value can be anything up to and including the
> > maximum rate of the root qdisc. It's the total of all the "rate"
> > parameters of the leaf classes that should add up to the root's total.
> > 
> 
> If I have users on different packages then how would I accomplish that?
> 

Something like:

tc qdisc add dev ... root handle 1: htb
tc class add dev ... parent 1: classid 1:1 htb rate 2000kbit
...
tc class add dev .... htb rate 200kbit ceil 2000kbit prio 1
tc class add dev .... htb rate 200kbit ceil 2000kbit prio 1
tc class add dev .... htb rate 200kbit ceil 1000kbit prio 2
tc class add dev .... htb rate 200kbit ceil 1000kbit prio 2
tc class add dev .... htb rate 200kbit ceil 500kbit prio 3
tc class add dev .... htb rate 200kbit ceil 500kbit prio 3
tc class add dev .... htb rate 200kbit ceil 500kbit prio 3
tc class add dev .... htb rate 200kbit ceil 500kbit prio 3
tc class add dev .... htb rate 200kbit ceil 500kbit prio 3
tc class add dev .... htb rate 200kbit ceil 500kbit prio 3

Note that all the rates add up to the root, but that each leaf class has
the ceil set at the top limit.

> > >  Don't know if I'm doing the math correctly but, how many users
> > > should a 15Mbps line should serve without problems?
> > 
> > Well obviously it depends on what your users are doing, but I think
> > 15Mbps should be fine for 2-300 users. I have a 4Mbps ADSL line shared
> > between 150 users. It's not the fastest, but it works for general use,
> > because bulk traffic gets classified at a lower priority than web
> > browsing.
> > 
> 
> I don't think we have a problem if all users use their connection for
> general use. But, I can't tell users what to do and not do, if you know
> what I mean. As mentioned earlier, I have user downloading p2p all day
> long, there are others using voip, there are others that use it for
> gaming, others chatting, etc... So, I thought if I limit users'
> bandwidth to a certain amount that I could just have them use whatever
> they're assigned and they can do whatever they want with that amount of
> bandwidth.

Try it, but you may find that your total aggregate bandwidth is not
enough to do it this way.

Andy