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Network Tuning - Revision history
2026-05-23T19:35:53Z
Revision history for this page on the wiki
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PhilippeTeuwen: Reverted edits by Etegohy (Talk) to last revision by PhilippeTeuwen
2010-11-24T20:33:18Z
<p>Reverted edits by <a href="/index.php?title=Special:Contributions/Etegohy" title="Special:Contributions/Etegohy">Etegohy</a> (<a href="/index.php?title=User_talk:Etegohy&action=edit&redlink=1" class="new" title="User talk:Etegohy (page does not exist)">Talk</a>) to last revision by <a href="/index.php?title=User:PhilippeTeuwen" title="User:PhilippeTeuwen">PhilippeTeuwen</a></p>
<p>Can't load revision 6804</p>
PhilippeTeuwen
https://wiki.yobi.be/index.php?title=Network_Tuning&diff=6646&oldid=prev
at 00:27, 24 November 2010
2010-11-24T00:27:22Z
<p></p>
<p>Can't load revision 6646</p>
https://wiki.yobi.be/index.php?title=Network_Tuning&diff=2906&oldid=prev
PhilippeTeuwen at 23:30, 1 March 2008
2008-03-01T23:30:05Z
<p></p>
<p><b>New page</b></p><div>''Converted with [[MediaWiki#HTML-WikiConverter|HTML::WikiConverter::MediaWiki]] from my old phpwiki site''<br />
----<br />
=== Links ===<br />
<br />
* http://www.all-nettools.com<br />
* NatTips<br />
* [http://www.lartc.org Linux Advanced Routing &amp; Traffic Control HOWTO] et [http://www.linux-france.org/prj/inetdoc/guides/lartc/ le même traduit en français]<br />
* [http://www.linux-ip.net/ Guide to IP Layer Network Administration with Linux]<br />
* [http://ipsysctl-tutorial.frozentux.net/ IPsysctl tutorial]<br />
* [http://www.iptables.org/documentation/index.html Netfilter/iptables documentation]<br />
<br />
==== Bridges &amp; Proxy-ARP ====<br />
<br />
* [http://bridge.sourceforge.net/ Linux ethernet bridging]<br />
* [http://www.ibiblio.org/pub/Linux/docs/HOWTO/unmaintained/Proxy-ARP Proxy-ARP mini howto] (old one)<br />
* [http://www.linux-ip.net/html/adv-proxy-arp.html Breaking a network in two with proxy ARP]<br />
* [http://www.linux-ip.net/html/scripts-proxy-arp.html Proxy ARP Scripts]<br />
* [http://www.linuxpowered.com/archive/mini/Proxy-ARP-Subnet/ ProxyARP Subnetting HOWTO]<br />
<br />
==== Traffic shaping ====<br />
<br />
* [http://www.internet2.edu/shalunov/writing/tcp-perf.html TCP over WAN Performance Tuning and Troubleshooting]<br />
* [http://lartc.org/wondershaper/ The Wonder Shaper]<br />
* [http://www.flynux.be/qos/QoS-connection-tuning-HOWTO.html QoS Connection Tuning HOWTO]<br />
* [http://ipband.sourceforge.net/ IP Bandwidth Watchdog]<br />
* http://www.flynux.be/netfilter/<br />
<br />
----<br />
<br />
=== Tools ===<br />
<br />
==== [http://dast.nlanr.net/Projects/Iperf/ Iperf] ====<br />
<br />
Examples of a WET11 to WET11 communication:<br />
<br />
<br />
apt-get install iperf<br />
<br />
Server: (TCP &amp; UDP via default port 5001)<br />
<br />
<br />
iperf -s -D<br />
iperf -s -D -u<br />
<br />
Client:<br />
<br />
<nowiki><br />
iperf -c 10.0.0.9<br />
------------------------------------------------------------<br />
Client connecting to 10.0.0.9, TCP port 5001<br />
TCP window size: 16.0 KByte (default)<br />
------------------------------------------------------------<br />
[ 5] local 10.0.0.136 port 1089 connected with 10.0.0.9 port 5001<br />
[ ID] Interval Transfer Bandwidth<br />
[ 5] 0.0-10.1 sec 6.41 MBytes 5.30 Mbits/sec<br />
<br />
iperf -c 10.0.0.9 -u -b 100M<br />
------------------------------------------------------------<br />
Client connecting to 10.0.0.9, UDP port 5001<br />
Sending 1470 byte datagrams<br />
UDP buffer size: 64.0 KByte (default)<br />
------------------------------------------------------------<br />
[ 5] local 10.0.0.136 port 1024 connected with 10.0.0.9 port 5001<br />
[ ID] Interval Transfer Bandwidth<br />
[ 5] 0.0-10.0 sec 11.4 MBytes 9.59 Mbits/sec<br />
[ 5] Server Report:<br />
[ 5] 0.0-10.1 sec 7.70 MBytes 6.37 Mbits/sec 3.415 ms 2668/ 8157 (33%)<br />
[ 5] Sent 8157 datagrams</nowiki><br />
<br />
Interesting test:<br />
<br />
<nowiki><br />
iperf -c 127.0.0.1<br />
------------------------------------------------------------<br />
Client connecting to 127.0.0.1, TCP port 5001<br />
TCP window size: 49.3 KByte (default)<br />
------------------------------------------------------------<br />
[ 3] local 127.0.0.1 port 51547 connected with 127.0.0.1 port 5001<br />
[ 3] 0.0-10.0 sec 3.99 GBytes 3.43 Gbits/sec<br />
<br />
iperf -c 127.0.0.1 -u -b 1G<br />
------------------------------------------------------------<br />
Client connecting to 127.0.0.1, UDP port 5001<br />
Sending 1470 byte datagrams<br />
UDP buffer size: 103 KByte (default)<br />
------------------------------------------------------------<br />
[ 3] local 127.0.0.1 port 32769 connected with 127.0.0.1 port 5001<br />
[ 3] 0.0-10.0 sec 941 MBytes 789 Mbits/sec<br />
[ 3] Sent 671249 datagrams<br />
[ 3] Server Report:<br />
[ 3] 0.0-10.0 sec 934 MBytes 785 Mbits/sec 0.000 ms 4831/671248 (0.72%)<br />
[ 3] 0.0-10.0 sec 1 datagrams received out-of-order</nowiki><br />
<br />
Looks like the kernel handles UDP much worsely than TCP!! <br />( tests done with a 2.6.15-1-686 )<br />
<br />
----<br />
<br />
4150 / mins = K/s<br />
<br />
apt-get install iproute<br />
<br />
Tests de ping sur www.ulg.ac.be<br />
<br />
* NORMAL<br />round-trip min/avg/max = 13.9/'''18.3'''/23.9 ms<br />
<br />
==== Tests avec download (wget -O /dev/null http://ftp.belnet.be/debian-cd/images/current/i386/debian-30r1-i386-binary-1.iso) ====<br />
<br />
* DOWNLINK='''2000''' THEORETIC LIMIT<br />Download '''1600 kbps'''<br />round-trip min/avg/max = 20.8/'''71.6'''/152.3 ms<br />
* DOWNLINK='''800'''<br />Download '''584 kbps'''<br />round-trip min/avg/max = 15.8/'''27.7'''/58.0 ms<br />
* DOWNLINK='''1500'''<br />Download '''1160 kbps'''<br />round-trip min/avg/max = 14.8/'''46.9'''/142.8 ms<br />
* DOWNLINK='''1600'''<br />Download '''1160 kbps'''<br />round-trip min/avg/max = 20.8/'''46.7'''/118.0 ms<br />
* DOWNLINK='''2000'''<br />Download '''1320 kbps'''<br />round-trip min/avg/max = 18.9/'''64.0'''/157.5 ms<br />
<br />
==== Tests avec upload (scp /home/server/www/win98-v02.img dorian.homelinux.org:/dev/null) ====<br />
<br />
* UPLINK='''512''' THEORETIC LIMIT<br />Upload '''416.0 kbps'''<br />round-trip min/avg/max = 18.9/'''138.4'''/258.1 ms<br />
* UPLINK='''220'''<br />Upload '''207.2 kbps'''<br />round-trip min/avg/max = 14.5/'''38.7'''/72.4 ms<br />
* UPLINK='''440'''<br />Upload '''425.6 kbps'''<br />round-trip min/avg/max = 40.4/'''147.7'''/317.9 ms<br />
* UPLINK='''400'''<br />Upload '''381.6 kbps'''<br />round-trip min/avg/max = 14.9/'''43.5'''/80.3 ms<br />
<br />
----<br />
<br />
=== Bandwidth analysis ===<br />
<br />
==== Ipband ====<br />
<br />
==== Darkstat ====<br />
<br />
Backport sur la Woody:<br />
<br />
apt-get source darkstat (sur une Sarge) -&gt; transfert sur la Woody<br />
cd darkstat-2.5<br />
apt-get install autotools-dev libpcap-dev<br />
debian/control l10: debconf (&gt;=1.2.9) -&gt; (&gt;=1.0.32)<br />
debian/rules binary<br />
cd ..<br />
dpkg -i darkstat_2.5-4_i386.deb<br />
editer /etc/darkstat/init.cfg<br />
/etc/init.d/darkstat start<br />
<br />
==== Autres ====<br />
<br />
* iptraf<br />
* argus<br />
* ntop</div>
PhilippeTeuwen