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From: Riccardo Losselli <riccardo@e4a.it>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Info about VoiP Qos
Date: Tue, 25 Jan 2005 09:47:57 +0000	[thread overview]
Message-ID: <41F615CD.4040803@e4a.it> (raw)
In-Reply-To: <41F28A25.1030108@e4a.it>

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Ed Wildgoose wrote:
| Please reply onlist in general
|

Sorry, i didn't notice the answer went to you only.. i did the same
mistake with Jason.

| Check the HTB code in iproute and look for the "hysteris" variable.
| Basically it just lets a couple of packets burst out at the same time
| instead of doinga  very granular per packet throttling.

ok..

| Find out what the protocol is on the line.  ADSL for example uses ATM to
| encapsulate each packet.  YOu buy 512Kbs of ATM bandwidth, which
| actually works out as somewhat less TCP bandwidth (which is what you are
| throttling).  So do some speed tests on the line and work out the REAL
| speed of the line.  Preferably use small packets since the overhead of
| encapsulation often shoots up then.
|
| This might not be relevant though - just a warning though

I understand it's a frame relay


| I meant, reserve (say) 10Kbs, and only share the rest...

I see.. this way it works.
Things are getting a little more complicated though..
I tested with some people, calling ip to ip, and it works just fine.
I understand that, if it's just a matter of my bandwith being overloaded
and not correctly shaped i should get the same disturbs, but i do not.
I suspect there is something involved on the server that converts the
call from ip to POTS and vice versa too..

Thanks!
Ricky
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      parent reply	other threads:[~2005-01-25  9:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-22 17:15 [LARTC] Info about VoiP Qos Riccardo Losselli
2005-01-22 18:11 ` Jason Boxman
2005-01-22 20:03 ` Riccardo Losselli
2005-01-23 20:54 ` Riccardo Losselli
2005-01-24 22:32 ` Ed Wildgoose
2005-01-25  9:47 ` Riccardo Losselli [this message]

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