[LARTC] bnig number of interfaces and upstream limit

[LARTC] bnig number of interfaces and upstream limit

[Arkadiusz Miskiewicz]

Hi,

The problem is: I have PPPoE (ppp over eth) server and 100 clients.
For each client new pppX interface is created.

Now I want to limit max speed on each interface to different
values. For example
ppp0 - downstream 256kbit, upstream 128kbit
ppp1 - downstream 512kbit, upstream 512kbit
...

Downstream is easy - I just add htb rule on user pppX interface
and that's all. 100 rules for 100 clients.

Upstream seems be big problem because AFAIK htb (cbq, too) must
be attached to outgoing interface which means that in my
case for each client there is 99 potential outgoing interfaces.

This means that I need to setup 10k rules for only 100 clients
(100 rules for each pppX interface) !

I'm not sure but 10k rules (u32 filter) is rather big number
for typical PC (or maybe I'm wrong and 10k rules is small
thing to process for ie. single duron 800MHz, 256MB RAM?).

Any ideas how to do such limiting in better way?
-- 
Arkadiusz Mi¶kiewicz   IPv6 ready PLD Linux at http://www.pld.org.pl
misiek(at)pld.org.pl   AM2-6BONE, 1024/3DB19BBD, arekm(at)ircnet, PWr

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Re: [LARTC] bnig number of interfaces and upstream limit

[Arkadiusz Miskiewicz]

Arkadiusz Miskiewicz <misiek@pld.ORG.PL> writes:

> Hi,
> 
> The problem is: I have PPPoE (ppp over eth) server and 100 clients.
> For each client new pppX interface is created.
> 
> Now I want to limit max speed on each interface to different
> values. For example
> ppp0 - downstream 256kbit, upstream 128kbit
> ppp1 - downstream 512kbit, upstream 512kbit
> ...
> 
> Downstream is easy - I just add htb rule on user pppX interface
> and that's all. 100 rules for 100 clients.
> 
> Upstream seems be big problem because AFAIK htb (cbq, too) must
> be attached to outgoing interface which means that in my
> case for each client there is 99 potential outgoing interfaces.
Uhm, it was so easy ;)

part of my python script now

    os.system("tc qdisc del root dev %s 2> /dev/null" % ppp_iface)
    os.system("tc qdisc del dev %s ingress 2> /dev/null" % ppp_iface)
    
    # downstream
    os.system("tc qdisc add dev %s root tbf rate %skbit latency 50ms burst 1540"
              % (ppp_iface, speed_down))
    
    # upstream
    os.system("tc qdisc add dev %s handle ffff: ingress" % ppp_iface)
    os.system("tc filter add dev %s parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate %skbit burst 10k drop flowid :1" % (ppp_iface, speed_up))

-- 
Arkadiusz Mi¶kiewicz   IPv6 ready PLD Linux at http://www.pld.org.pl
misiek(at)pld.org.pl   AM2-6BONE, 1024/3DB19BBD, arekm(at)ircnet, PWr
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Re: [LARTC] bnig number of interfaces and upstream limit

[Stef Coene]

> Downstream is easy - I just add htb rule on user pppX interface
> and that's all. 100 rules for 100 clients.
>
> Upstream seems be big problem because AFAIK htb (cbq, too) must
> be attached to outgoing interface which means that in my
> case for each client there is 99 potential outgoing interfaces.
>
> This means that I need to setup 10k rules for only 100 clients
> (100 rules for each pppX interface) !
>
> I'm not sure but 10k rules (u32 filter) is rather big number
> for typical PC (or maybe I'm wrong and 10k rules is small
> thing to process for ie. single duron 800MHz, 256MB RAM?).
>
> Any ideas how to do such limiting in better way?
You can use the imq device to catch all incoming traffic.  You can create 10 
subclasses and put each client data in 1 subclass.  Or you can use the 
ingress qdisc and use the policers in the filters to throttle incoming 
traffic per interface.

Stef

-- 

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