[LARTC] Difficulties trying to control VOIP traffic with TC - HTB

[LARTC] Difficulties trying to control VOIP traffic with TC - HTB

[Ricardo Soria]

Hi all:

I hope someone can help me with this "little"
problem...

I'm using a linux script to sub-divide my bandwidth
(64kbit) into:  40kbit for VOIP, and the remaining
24kbit for http.  So, the commands I'm using are:

======================

#!/bin/bash

# This script shapes "downloading" stuff

# Initial qdisc
tc qdisc add dev eth1 root handle 1: htb default 20
r2q 2

# Classes definition
tc class add dev eth1 parent 1: classid 1:1 htb rate \
64kbit ceil 64kbit
tc class add dev eth1 parent 1:1 classid 1:10 htb \
rate 40kbit ceil 40kbit prio 0
tc class add dev eth1 parent 1:1 classid 1:20 htb \
rate 24kbit ceil 24kbit prio 1

# Filters

# This is filter for VOIP
tc filter add dev eth1 protocol ip parent 1:0 prio 1 \
u32 match ip dst 1.2.3.4 flowid 1:10

# Remaining traffic is supossed to go to default 20
class

# Script end

======================

I reached this script after a lot of investigation and
tryings.  So, the bandwidth distribution seems to be
ok.  But here my problem:  Every time a person is
using VOIP, and another person starts surfing the
Internet (from a different IP, of course) at the same
time, the sound quality of the VOIP decreases notably.
 I have priorized VOIP traffic, as it can be seen on
"prio 0".  I even used IPTABLES statements to set
Minimize-Delay to packets coming from VOIP ip address.
 But every effort seems to be unuseful:  Every time
someone opens web browser, VOIP sound quality goes
down...

So, could someone tell me what's wrong about my
script??  I know it is possible to get what I'm trying
with htb, anyway...

Very thanks to everybody.

Cheers.

Ricardo Soria.

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RE: [LARTC] Difficulties trying to control VOIP traffic with TC - HTB

[Kotek Tichomir]

Hi

trouble is that you can not control incoming traffic.
so VoIP packets and downloads are mixing in unpredictable manner
(browsing tends to bursts when page/images downloads)
this is IMHO "the cause"
anyone has solution ? 


tk
-----Original Message-----
From:	Ricardo Soria [mailto:ricardo_soria@yahoo.com]
Sent:	Tue 09-Dec-03 03:48
To:	lartc@mailman.ds9a.nl
Subject:	[LARTC] Difficulties trying to control VOIP traffic with TC - HTB
Hi all:

I hope someone can help me with this "little"
problem...

I'm using a linux script to sub-divide my bandwidth
(64kbit) into:  40kbit for VOIP, and the remaining
24kbit for http.  So, the commands I'm using are:
...

I reached this script after a lot of investigation and
tryings.  So, the bandwidth distribution seems to be
ok.  But here my problem:  Every time a person is
using VOIP, and another person starts surfing the
Internet (from a different IP, of course) at the same
time, the sound quality of the VOIP decreases notably.
 I have priorized VOIP traffic, as it can be seen on
"prio 0".  I even used IPTABLES statements to set
Minimize-Delay to packets coming from VOIP ip address.
 But every effort seems to be unuseful:  Every time
someone opens web browser, VOIP sound quality goes
down...

So, could someone tell me what's wrong about my
script??  I know it is possible to get what I'm trying
with htb, anyway...

Very thanks to everybody.

Cheers.

Ricardo Soria.

_________________________________________________________
Do You Yahoo!?
Información de Estados Unidos y América Latina, en Yahoo! Noticias.
Visítanos en http://noticias.espanol.yahoo.com
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RE: [LARTC] Difficulties trying to control VOIP traffic with TC - HTB

[Ricardo Soria]

Very thanks, Kotek:

I've been trying another ways, and making
modifications to my rules, but the problem continue to
be allways the same.  Last change I made was to
subdivide upload traffic (in addition to download
traffic), because I read that upload traffic could
also affect, but this didn't help notably, as you
know.

Does someone have a definitive solution??  I know it
exists...  Very thanks in advance.

Ricardo Soria.

 --- Kotek Tichomir <tichomir.kotek@lynx.sk> escribió:
> 
> Hi
> 
> trouble is that you can not control incoming
> traffic.
> so VoIP packets and downloads are mixing in
> unpredictable manner
> (browsing tends to bursts when page/images
> downloads)
> this is IMHO "the cause"
> anyone has solution ? 
> 
> 
> tk
> -----Original Message-----
> From:	Ricardo Soria [mailto:ricardo_soria@yahoo.com]
> Sent:	Tue 09-Dec-03 03:48
> To:	lartc@mailman.ds9a.nl
> Subject:	[LARTC] Difficulties trying to control VOIP
> traffic with TC - HTB
> Hi all:
> 
> I hope someone can help me with this "little"
> problem...
> 
> I'm using a linux script to sub-divide my bandwidth
> (64kbit) into:  40kbit for VOIP, and the remaining
> 24kbit for http.  So, the commands I'm using are:
> ...
> 
> I reached this script after a lot of investigation
> and
> tryings.  So, the bandwidth distribution seems to be
> ok.  But here my problem:  Every time a person is
> using VOIP, and another person starts surfing the
> Internet (from a different IP, of course) at the
> same
> time, the sound quality of the VOIP decreases
> notably.
>  I have priorized VOIP traffic, as it can be seen on
> "prio 0".  I even used IPTABLES statements to set
> Minimize-Delay to packets coming from VOIP ip
> address.
>  But every effort seems to be unuseful:  Every time
> someone opens web browser, VOIP sound quality goes
> down...
> 
> So, could someone tell me what's wrong about my
> script??  I know it is possible to get what I'm
> trying
> with htb, anyway...
> 
> Very thanks to everybody.
> 
> Cheers.
> 
> Ricardo Soria.
> 
>
_________________________________________________________
> Do You Yahoo!?
> Información de Estados Unidos y América Latina, en
> Yahoo! Noticias.
> Visítanos en http://noticias.espanol.yahoo.com
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO:
> http://lartc.org/
> 
> 
>  

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