Sorry I pressed the wrong key and sent the message too early... > -----Ursprüngliche Nachricht----- > Von: Philipp Leusmann [mailto:philipp.leusmann@xxxxxxxxxxxxxx] > Gesendet: Mittwoch, 8. November 2006 12:53 > An: 'lartc@xxxxxxxxxxxxxxx' > Betreff: Why did I need strange ceiling settings? > > Hi all, > > I recently installed traffic shaping on my ADSL line with a nominal upload > rate of 1MBit. My Modem says it has an upload bitrate of 843 kbits. > So I thought, to use a ceiling of 800kbit for the root qdisc is a good > idea. > But with that setting I only achieved upload rates of around 300kbits > whereas I reached around 650 kbits without traffic shaping. > Yesterday I played a little with the ceiling value and found that > increasing it to 175kBps did the job. > Could anybody please explain this strange behaviour? > > My shaping script looks as follows: UPRATE="175kbps" P2PRATE="20kbps" PRIORATE1="80kbps" PRIORATE2="50kbps" PRIORATE3="40kbps" PRIORATE4="5kbps" MTU="`/sbin/ifconfig $EXTIF | grep 'MTU' | awk '{print $6}' | sed -e 's/.*://'`" # Quantum QUANTUM1=$(($MTU*4)) QUANTUM2=$(($MTU*3)) QUANTUM3=$(($MTU*2)) QUANTUM4=$MTU # Burst ## removed bursts #BURST1="6k" #BURST2="4k" #BURST3="2k" #BURST4="0k" #CBURST1="3k" #CBURST2="2k" #CBURST3="1k" #CBURST4="0k" echo "Set queue length for IFACE" # Set queue length for IFACE ifconfig $IFACE txqueuelen 16 echo "Trying to delete old ruleset. Will give error if it does not exist" tc qdisc del dev $IFACE root echo "Specify queue discipline" # Specify queue discipline tc qdisc add dev $IFACE root handle 1:0 htb default 103 echo "Set root class" # Set root class tc class add dev $IFACE parent 1:0 classid 1:1 htb rate $UPRATE ceil $UPRATE echo "Specify sub classes" # Specify sub classes tc class add dev $IFACE parent 1:1 classid 1:101 htb rate $PRIORATE1 ceil $UPRATE quantum $QUANTUM1 prio 0 tc class add dev $IFACE parent 1:1 classid 1:102 htb rate $PRIORATE2 ceil $UPRATE quantum $QUANTUM2 prio 1 tc class add dev $IFACE parent 1:1 classid 1:103 htb rate $PRIORATE3 ceil $UPRATE quantum $QUANTUM3 prio 2 tc class add dev $IFACE parent 1:1 classid 1:104 htb rate $PRIORATE4 ceil $P2PRATE quantum $QUANTUM4 prio 3 echo "Filter packets" # Filter packets tc filter add dev $IFACE parent 1:0 protocol ip prio 0 handle $MARKPRIO1 fw classid 1:101 tc filter add dev $IFACE parent 1:0 protocol ip prio 1 handle $MARKPRIO2 fw classid 1:102 tc filter add dev $IFACE parent 1:0 protocol ip prio 2 handle $MARKPRIO3 fw classid 1:103 tc filter add dev $IFACE parent 1:0 protocol ip prio 3 handle $MARKPRIO4 fw classid 1:104 UPRATE="175kbps" P2PRATE="20kbps" PRIORATE1="80kbps" PRIORATE2="50kbps" PRIORATE3="40kbps" PRIORATE4="5kbps" MTU="`/sbin/ifconfig $EXTIF | grep 'MTU' | awk '{print $6}' | sed -e 's/.*://'`" # Quantum QUANTUM1=$(($MTU*4)) QUANTUM2=$(($MTU*3)) QUANTUM3=$(($MTU*2)) QUANTUM4=$MTU # Burst ## removed bursts #BURST1="6k" #BURST2="4k" #BURST3="2k" #BURST4="0k" #CBURST1="3k" #CBURST2="2k" #CBURST3="1k" #CBURST4="0k" echo "Set queue length for IFACE" # Set queue length for IFACE ifconfig $IFACE txqueuelen 16 echo "Trying to delete old ruleset. Will give error if it does not exist" tc qdisc del dev $IFACE root echo "Specify queue discipline" # Specify queue discipline tc qdisc add dev $IFACE root handle 1:0 htb default 103 echo "Set root class" # Set root class tc class add dev $IFACE parent 1:0 classid 1:1 htb rate $UPRATE ceil $UPRATE echo "Specify sub classes" # Specify sub classes tc class add dev $IFACE parent 1:1 classid 1:101 htb rate $PRIORATE1 ceil $UPRATE quantum $QUANTUM1 prio 0 tc class add dev $IFACE parent 1:1 classid 1:102 htb rate $PRIORATE2 ceil $UPRATE quantum $QUANTUM2 prio 1 tc class add dev $IFACE parent 1:1 classid 1:103 htb rate $PRIORATE3 ceil $UPRATE quantum $QUANTUM3 prio 2 tc class add dev $IFACE parent 1:1 classid 1:104 htb rate $PRIORATE4 ceil $P2PRATE quantum $QUANTUM4 prio 3 echo "Filter packets" # Filter packets tc filter add dev $IFACE parent 1:0 protocol ip prio 0 handle $MARKPRIO1 fw classid 1:101 tc filter add dev $IFACE parent 1:0 protocol ip prio 1 handle $MARKPRIO2 fw classid 1:102 tc filter add dev $IFACE parent 1:0 protocol ip prio 2 handle $MARKPRIO3 fw classid 1:103 tc filter add dev $IFACE parent 1:0 protocol ip prio 3 handle $MARKPRIO4 fw classid 1:104 Thanks in advance and sorry for the incomplete posting. Greetings, Philipp _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
