LARTC - Jun 2002 - Why this stupid ingress tc does not work ?

Hi !

I wanted to shape my analog modem connection so I took these two lines
from the ''wondershaper'' script:

tc qdisc add dev $DEV handle ffff: ingress


#tc filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip
\ src 0.0.0.0/0 police rate ${DOWNLINK} burst 10k drop flowid :1


with DEV=ppp0 and DOWNLINK=24kbit.
But, when I activate it, nothing comes back from the web, no ping.

''tc -s qdisc'' gives:

qdisc ingress ffff: dev ppp0 ----------------
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0)

I can see the packets or ping replies with a tcpdump -i ppp0
but the packets do not seem to reach applications !

I run kernel 2.4.18... what''s the problem ?


Cheers,

  Ludovic Drolez.

----- Original Message -----
From: "ludo" <ludovic.drolez@freealter.com>
To: <lartc@mailman.ds9a.nl>
Sent: Thursday, June 13, 2002 1:22 AM
Subject: [LARTC] Why this stupid ingress tc does not work ?

> Hi !
>
> I wanted to shape my analog modem connection so I took these two lines
> from the ''wondershaper'' script:
>
> tc qdisc add dev $DEV handle ffff: ingress
>
>
> #tc filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip
> \ src 0.0.0.0/0 police rate ${DOWNLINK} burst 10k drop flowid :1
>
>
> with DEV=ppp0 and DOWNLINK=24kbit.
> But, when I activate it, nothing comes back from the web, no ping.
>
> ''tc -s qdisc'' gives:
>
> qdisc ingress ffff: dev ppp0 ----------------
>  Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
In fact, the qdisc does work, only the output of the byte and packet count
is not implemented I guess.

Cheers,
Jan
>
> I can see the packets or ping replies with a tcpdump -i ppp0
> but the packets do not seem to reach applications !
>
> I run kernel 2.4.18... what''s the problem ?
>
>
> Cheers,
>
>   Ludovic Drolez.
>
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>
>

Hi,

I suggest you to use IMQ device. This makes possible to shape & queue
incomiong trafic.

Bye,
Tadas

Thu, Jun 13, 2002 at 09:49:46AM +0200, Jan Coppens rašė:
> ----- Original Message -----
> From: "ludo" <ludovic.drolez@freealter.com>
> To: <lartc@mailman.ds9a.nl>
> Sent: Thursday, June 13, 2002 1:22 AM
> Subject: [LARTC] Why this stupid ingress tc does not work ?
> 
> 
> > Hi !
> >
> > I wanted to shape my analog modem connection so I took these two lines
> > from the ''wondershaper'' script:
> >
> > tc qdisc add dev $DEV handle ffff: ingress
> >
> >
> > #tc filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip
> > \ src 0.0.0.0/0 police rate ${DOWNLINK} burst 10k drop flowid :1
> >
> >
> > with DEV=ppp0 and DOWNLINK=24kbit.
> > But, when I activate it, nothing comes back from the web, no ping.
> >
> > ''tc -s qdisc'' gives:
> >
> > qdisc ingress ffff: dev ppp0 ----------------
> >  Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
> 
> In fact, the qdisc does work, only the output of the byte and packet count
> is not implemented I guess.
> 
> Cheers,
> Jan
> 
> >
> > I can see the packets or ping replies with a tcpdump -i ppp0
> > but the packets do not seem to reach applications !
> >
> > I run kernel 2.4.18... what''s the problem ?

> In fact, the qdisc does work, only the output of the byte and packet 
count
 > is not implemented I guess.

Ok but, in the previous example, the qdisc does not seem to work...
I do not see packets going back to the ppp0 interface !

Weird, since these lines are taken from the wondershaper script...

Any idea ? TC does not work with analog modems ?

-- 
Ludovic DROLEZ                                       Free&ALter Soft
152, rue de Grigy - Technopole Metz 2000                  57070 METZ
tel : 03 87 75 55 21                            fax : 03 87 75 19 26