[LARTC] Voip QOS

[LARTC] Voip QOS

[Muhammed Soyer]

Hi,
    I have an 128K wan connection to one of my offices. We are using VOIP on this connection ..We also carry our data traffic on this line ..Some time , when the data traffic is high , the voice quality drops drastically ..
I have tried prio queues ..I let the voice traffic use the first band ..And the other data tarffic third band ..
This makes things a little better ..But not quite well ..
    An other problem is ..I both want to priotize and shape my traffic ..
For example ..I want to limit the mail traffic to some kbits ..While I am letting the voice traffic the best priority ..
I try to use HTB with PRIO qdisc ..But couldnt be succesfull ..

What do you suggest me to make the voice quality good enough ..and shape the data traffic related to some criteria ?

Thanx

-ms




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Re: [LARTC] Voip QOS

[King Yung Tong]

Hello, can you post your working script about the prio and VOIP.
I am doing some prio script but it is not working.

Pat

On Mon, 10 Jun 2002, Muhammed Soyer wrote:

> Hi,
>     I have an 128K wan connection to one of my offices. We are using VOIP on this connection ..We also carry our data traffic on this line ..Some time , when the data traffic is high , the voice quality drops drastically ..
> I have tried prio queues ..I let the voice traffic use the first band ..And the other data tarffic third band ..
> This makes things a little better ..But not quite well ..
>     An other problem is ..I both want to priotize and shape my traffic ..
> For example ..I want to limit the mail traffic to some kbits ..While I am letting the voice traffic the best priority ..
> I try to use HTB with PRIO qdisc ..But couldnt be succesfull ..
> 
> What do you suggest me to make the voice quality good enough ..and shape the data traffic related to some criteria ?
> 
> Thanx
> 
> -ms
> 
> 
> 
> 
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
> 

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Re: [LARTC] Voip QOS

[Stef Coene]

On Monday 10 June 2002 21:50, Muhammed Soyer wrote:
> Hi,
>     I have an 128K wan connection to one of my offices. We are using VOIP
> on this connection ..We also carry our data traffic on this line ..Some
> time , when the data traffic is high , the voice quality drops drastically
> .. I have tried prio queues ..I let the voice traffic use the first band
> ..And the other data tarffic third band .. This makes things a little
> better ..But not quite well ..
>     An other problem is ..I both want to priotize and shape my traffic ..
> For example ..I want to limit the mail traffic to some kbits ..While I am
> letting the voice traffic the best priority .. I try to use HTB with PRIO
> qdisc ..But couldnt be succesfull ..
>
> What do you suggest me to make the voice quality good enough ..and shape
> the data traffic related to some criteria ?
What are the requirements for a good VOIP link?  Steady bandwidth, low 
latency, low jitter,  ...

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.openprojects.net
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Re: [LARTC] Voip QOS

[Michael T. Babcock]

Stef Coene wrote:

>What are the requirements for a good VOIP link?  Steady bandwidth, low 
>latency, low jitter,  ...
>  
>

All of the above, in my experience.  Depending on the protocol, good 
bandwidth (as opposed to perfect) and very low latency are required. 
 Bandwidth equal to the target bandwidth with very low latency and no 
fragmentation is perfect.  Part of the problem is not knowing your 
maximum number of VOIP links.

In a perfect world, one would use PRIO and mark the VOIP packets as "go 
now ... do not pass go, do not collect $200".
-- 
Michael T. Babcock



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Re: [LARTC] Voip QOS

[Muhammed Soyer]

Hello
I have used the foolowing simple one

sbin/tc qdisc add dev ipsec0 root handle 1: prio
/sbin/tc qdisc add dev ipsec0 parent 1:1 handle 10: sfq
/sbin/tc qdisc add dev ipsec0 parent 1:2 handle 20: sfq
/sbin/tc qdisc add dev ipsec0 parent 1:3 handle 30: sfq

/sbin/tc filter add dev ipsec0  protocol ip parent 1:0 prio 1 u32  match ip src 10.0.192.240        flowid 1:1
/sbin/tc filter add dev ipsec0  protocol ip parent 1:0 prio 1 u32  match ip src 10.0.192.0/21         flowid 1:3

10.0.192.240 is the IP of the VOIP device ..
I let the others traffic go to the 3rd band



----- Original Message ----- 
From: "King Yung Tong" <tong@cs.dal.ca>
To: "Muhammed Soyer" <msoyer@ges.net.tr>
Cc: <lartc@mailman.ds9a.nl>; <devik@cdi.cz>
Sent: Monday, June 10, 2002 11:17 PM
Subject: Re: [LARTC] Voip QOS


Hello, can you post your working script about the prio and VOIP.
I am doing some prio script but it is not working.

Pat

On Mon, 10 Jun 2002, Muhammed Soyer wrote:

> Hi,
>     I have an 128K wan connection to one of my offices. We are using VOIP on this connection ..We also carry our data traffic on this line ..Some time , when the data traffic is high , the voice quality drops drastically ..
> I have tried prio queues ..I let the voice traffic use the first band ..And the other data tarffic third band ..
> This makes things a little better ..But not quite well ..
>     An other problem is ..I both want to priotize and shape my traffic ..
> For example ..I want to limit the mail traffic to some kbits ..While I am letting the voice traffic the best priority ..
> I try to use HTB with PRIO qdisc ..But couldnt be succesfull ..
> 
> What do you suggest me to make the voice quality good enough ..and shape the data traffic related to some criteria ?
> 
> Thanx
> 
> -ms
> 
> 
> 
> 
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
> 

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