[LARTC] Traffic is exceeding limits

[LARTC] Traffic is exceeding limits

[Mindaugas Riauba]

  I'm trying to setup traffic shaping for a customer.
Machine is RedHat 7.3 with kernel-smp-2.4.18-18.7.x.
HZQ2.

  But when I try to load link (using netcat and discard /
chargen services) bytes count (tc -s qdisc show, sfq qdisc)
goes quite well over 512kbit (~560kbit). With UDP I can
even go over 1mbit.

  What can be done to ensure tighter limits?

  Thanks,

  Mindaugas

  burst and cburst were set by tc and equals 2175b. r2q = 10.

  No more tc rules exists now.

$TC qdisc del dev eth0 root
$TC qdisc del dev eth1 root

$TC qdisc add dev eth0 root handle 1: htb
$TC qdisc add dev eth1 root handle 1: htb

$TC class add dev eth0 parent 1: classid 1:200 htb rate 512kbit
$TC class add dev eth1 parent 1: classid 1:200 htb rate 512kbit

$TC qdisc add dev eth0 parent 1:200 handle 200: sfq perturb 10
$TC qdisc add dev eth1 parent 1:200 handle 200: sfq perturb 10

$TC filter add dev eth0 parent 1: protocol ip prio 1 u32 match ip src $ip
flowid 1:200
$TC filter add dev eth1 parent 1: protocol ip prio 1 u32 match ip dst $ip
flowid 1:200

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Re: [LARTC] Traffic is exceeding limits

[Stef Coene]

On Wednesday 18 December 2002 13:23, Mindaugas Riauba wrote:
>   I'm trying to setup traffic shaping for a customer.
> Machine is RedHat 7.3 with kernel-smp-2.4.18-18.7.x.
> HZ=512.
>
>   But when I try to load link (using netcat and discard /
> chargen services) bytes count (tc -s qdisc show, sfq qdisc)
> goes quite well over 512kbit (~560kbit). With UDP I can
> even go over 1mbit.
I did the same.  I used ttcp and recorded the bandwidth I could use. But my 
results where nearly perfetc (I recorder the bandwidth on a very log period).  
Recently I tried it with upd data but I had some strange results.  1 UDP data 
stream was shaped perfectly, but 2 UPD data streams can use the full link 
bandwidth.  I still have to test ir further.

Stef


-- 

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

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