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Buffer Bloat » Historique » Version 9

Laurent GUERBY, 09/12/2011 10:54

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h1. Buffer Bloat
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* http://bufferbloat.net
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* http://queue.acm.org/detail.cfm?id=2071893
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h2. QoS
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* tc qdisc par IP source
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http://lists.tetalab.org/pipermail/tetaneutral/2011-April/000129.html
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* ebtable packet flow chart http://ebtables.sourceforge.net/br_fw_ia/PacketFlow.png
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* tc openwrt theory http://wiki.openwrt.org/doc/howto/tc/tc.theory
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* tc openwrt howto http://wiki.openwrt.org/doc/howto/tc
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* doc HTB http://luxik.cdi.cz/~devik/qos/htb/manual/userg.htm
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* http://www.faqs.org/docs/Linux-HOWTO/ADSL-Bandwidth-Management-HOWTO.html
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* [PATCH net-next] sch_red: Adaptative RED AQM http://www.spinics.net/lists/netdev/msg182750.html
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* http://icir.org/floyd/papers/adaptiveRed.pdf
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Partage de bande passante ADSL
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<pre>
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# Version du 20111207
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function do_qos {
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  tc qdisc add dev $DEV root handle 1: htb default 1
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  tc class add dev $DEV parent 1: classid 1:1 htb rate $RATE
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  for IP in $IP_LIST; do
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    tc class add dev $DEV parent 1:1 classid 1:$IP htb rate 1kbit ceil $RATE
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    tc filter add dev $DEV protocol ip parent 1:0 prio 1 u32 match ip $DIR 91.224.148.$IP flowid 1:$IP
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  done
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}
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DIR=dst #on gw then RATE= ADSL download speed
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#DIR=src #on local machine then RATE= ADSL upload speed
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DEV=tapstg
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RATE=11000kbit # src 700kbit
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IP_LIST=$(seq 129 144)
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do_qos
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DEV=tapthd
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RATE=5500kbit # src TODO
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IP_LIST=$(seq 194 207)
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do_qos
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DEV=tapmon
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RATE=480kbit # src 96kbit
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IP_LIST=$(seq 114 115)
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do_qos
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</pre>
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Pour supprimer un qdisc :
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<pre>
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tc qdisc del dev tapxxx root
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</pre>
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Pour afficher :
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<pre>
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tc -p -s -d qdisc show dev tapxxx
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tc -p -s -d class show dev tapxxx
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tc -p -s -d filter show dev tapxxx
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</pre>