I will be out of the office from 8/19 until 8/23. I will be returning on Monday
afternoon, 8/26, and will reply then.
Thank you,
Michael Pellegrino
Softerware, Inc.
___________________________________________________________________________
Subject: LARTC digest, Vol 1 #725 - 2 msgs
From: [EMAIL PROTECTED]
Date: 08/19/02 01:27:39
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Today's Topics:
1. VoIP and QoS (Patrick Chan)
2. Re: filter in-cache traffic with tc (Alexey Talikov)
--__--__--
Message: 1
From: Patrick Chan <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Date: Mon, 19 Aug 2002 10:01:18 +0800
Subject: [LARTC] VoIP and QoS
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There are two Linux routers, a 64K leased line is used
to connect these two machines. Now, we would like to run
Voice over IP between two machines. We have to run QoS and
tag voice packet's TOS field,
otherwise, the voice quality is terrible if we transfer file
and make voice call at the same time.
I am not familiar with tc in Linux. But I have copied a script
from LARTC archives. If the following config is used, the situation
is better than nothing used. The voice packets can be tagged as
TOS=0x21:
tc qdisc add dev hdlc0 parent 1:1 handle 2: pfifo limit 512
tc qdisc add dev hdlc0 parent 1:2 handle 3: pfifo limit 512
tc qdisc add dev hdlc0 parent 1:3 handle 4: pfifo limit 512
tc filter add dev hdlc0 parent 1:0 protocol ip prio 1 u32 divisor 1
tc filter add dev hdlc0 parent 1:0 prio 1 u32 match ip tos 0x21 0xff flowid
1:1
I don't know what it means exactly. But this is used, the voice quality
is bad at the beginning when file is transferred. The voice quality will
"converge" to be good after about 30 seconds.
However, this is not acceptable. Can anyone tell me what is the best
tc config for running VoIP? Thanks very much.
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2653.12">
<TITLE>VoIP and QoS</TITLE>
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<P><FONT SIZE=2>There are two Linux routers, a 64K leased line is used</FONT>
<BR><FONT SIZE=2>to connect these two machines. Now, we would like to run</FONT>
<BR><FONT SIZE=2>Voice over IP between two machines. We have to run QoS and </FONT>
<BR><FONT SIZE=2>tag voice packet's TOS field,</FONT>
<BR><FONT SIZE=2>otherwise, the voice quality is terrible if we transfer file</FONT>
<BR><FONT SIZE=2>and make voice call at the same time.</FONT>
</P>
<P><FONT SIZE=2>I am not familiar with tc in Linux. But I have copied a script</FONT>
<BR><FONT SIZE=2>from LARTC archives. If the following config is used, the
situation</FONT>
<BR><FONT SIZE=2>is better than nothing used. The voice packets can be tagged as
</FONT>
<BR><FONT SIZE=2>TOS=0x21:</FONT>
</P>
<P><FONT SIZE=2>tc qdisc add dev hdlc0 parent 1:1 handle 2: pfifo limit 512</FONT>
<BR><FONT SIZE=2>tc qdisc add dev hdlc0 parent 1:2 handle 3: pfifo limit 512</FONT>
<BR><FONT SIZE=2>tc qdisc add dev hdlc0 parent 1:3 handle 4: pfifo limit 512</FONT>
<BR><FONT SIZE=2>tc filter add dev hdlc0 parent 1:0 protocol ip prio 1 u32 divisor
1</FONT>
<BR><FONT SIZE=2>tc filter add dev hdlc0 parent 1:0 prio 1 u32 match ip tos 0x21 0xff
flowid 1:1</FONT>
</P>
<P><FONT SIZE=2>I don't know what it means exactly. But this is used, the voice
quality</FONT>
<BR><FONT SIZE=2>is bad at the beginning when file is transferred. The voice quality
will</FONT>
<BR><FONT SIZE=2>"converge" to be good after about 30 seconds.</FONT>
</P>
<P><FONT SIZE=2>However, this is not acceptable. Can anyone tell me what is the
best</FONT>
<BR><FONT SIZE=2>tc config for running VoIP? Thanks very much.</FONT>
</P>
</BODY>
</HTML>
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Message: 2
Date: Mon, 19 Aug 2002 09:05:12 +0500
From: Alexey Talikov <[EMAIL PROTECTED]>
Reply-To: Alexey Talikov <[EMAIL PROTECTED]>
Organization: Fortek
To: Fabian Gervan <[EMAIL PROTECTED]>
Cc: [EMAIL PROTECTED]
Subject: Re: [LARTC] filter in-cache traffic with tc
Hello Fabian,
I recomend you use squid delay pools or WRR qdisc with patch for
squid.
see this links
http://wipl-wrr.sourceforge.net/
http://squid-docs.sourceforge.net/latest/html/x2116.html
Monday, August 19, 2002, 7:31:05 AM, you wrote:
FG> Hello lartc, I am using squid in transparent mode, and bandwith control
FG> with tc (htb). (redhat 7.3).
FG> Currently I mark packets comming from 3128 (squid
FG> port) to users, there are any way to filter the trafic if the object
FG> that user request alreay is in the squid cache (hit)?
FG> sorry for my english.
-----------------------------------
mailto:[EMAIL PROTECTED]
BR
Alexey Talikov
FORTEK
-----------------------------------
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