LARTC - Jul 2003 - slowing down traffic to a certain port

This is my first attempt at understanding lartc:

I want to throttle outgoing bandwidth fo a certain tcp port and leave
other traffic the way it was.

so I put a prio qdisc at the root of eth0 (dummy priomap since i want to use
filters to switch bands):
$ tc qdisc add dev eth0 root handle 1: prio bands 2 priomap 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0

then attach a tbf qdisc at 1:2 :
$ tc qdisc add dev eth0 parent 1:2 handle 20: tbf rate 2kbit buffer 100 limit
300

now i want traffic to port 4662 to be enqueued to the tbf qdisc:
$ tc filter add dev eth0 parent 1:0 protocol ip prio 1 u32 match ip sport 4662
0xffff flowid 1:2
but it doesn''t work:
RTNETLINK answers: Invalid argument

why? wrong syntax?

thanks
Radu

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On Sunday 13 July 2003 13:21, Radu Maurer wrote:
> This is my first attempt at understanding lartc:
>
> I want to throttle outgoing bandwidth fo a certain tcp port and leave
> other traffic the way it was.
>
> so I put a prio qdisc at the root of eth0 (dummy priomap since i want to
> use filters to switch bands):
> $ tc qdisc add dev eth0 root handle 1: prio bands 2 priomap 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0
>
> then attach a tbf qdisc at 1:2 :
> $ tc qdisc add dev eth0 parent 1:2 handle 20: tbf rate 2kbit buffer 100
> limit 300
>
> now i want traffic to port 4662 to be enqueued to the tbf qdisc:
> $ tc filter add dev eth0 parent 1:0 protocol ip prio 1 u32 match ip sport
> 4662 0xffff flowid 1:2 but it doesn''t work:
> RTNETLINK answers: Invalid argument
See lartc.org and docum.org for more information / scripts / tips about 
traffic shaping.

Stef

-- 

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

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