106 lines
3.4 KiB
Perl
106 lines
3.4 KiB
Perl
#!/usr/bin/perl
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#
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#
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# AF using CBQ for a single interface eth0
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# 4 AF classes using GRED and one BE using RED
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# Things you might want to change:
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# - the device bandwidth (set at 10Mbits)
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# - the bandwidth allocated for each AF class and the BE class
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# - the drop probability associated with each AF virtual queue
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#
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# AF DSCP values used (based on AF draft 04)
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# -----------------------------------------
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# AF DSCP values
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# AF1 1. 0x0a 2. 0x0c 3. 0x0e
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# AF2 1. 0x12 2. 0x14 3. 0x16
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# AF3 1. 0x1a 2. 0x1c 3. 0x1e
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# AF4 1. 0x22 2. 0x24 3. 0x26
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#
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#
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# A simple DSCP-class relationship formula used to generate
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# values in the for loop of this script; $drop stands for the
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# DP
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# $dscp = ($class*8+$drop*2)
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#
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# if you use GRIO buffer sharing, then GRED priority is set as follows:
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# $gprio=$drop+1;
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#
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$TC = "/usr/src/iproute2-current/tc/tc";
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$DEV = "dev lo";
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$DEV = "dev eth1";
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$DEV = "dev eth0";
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# the BE-class number
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$beclass = "5";
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#GRIO buffer sharing on or off?
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$GRIO = "";
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$GRIO = "grio";
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# The bandwidth of your device
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$linerate="10Mbit";
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# The BE and AF rates
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%rate_table=();
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$berate="1500Kbit";
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$rate_table{"AF1rate"}="1500Kbit";
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$rate_table{"AF2rate"}="1500Kbit";
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$rate_table{"AF3rate"}="1500Kbit";
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$rate_table{"AF4rate"}="1500Kbit";
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#
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#
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#
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print "\n# --- General setup ---\n";
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print "$TC qdisc add $DEV handle 1:0 root dsmark indices 64 set_tc_index\n";
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print "$TC filter add $DEV parent 1:0 protocol ip prio 1 tcindex mask 0xfc " .
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"shift 2 pass_on\n";
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#"shift 2\n";
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print "$TC qdisc add $DEV parent 1:0 handle 2:0 cbq bandwidth $linerate ".
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"cell 8 avpkt 1000 mpu 64\n";
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print "$TC filter add $DEV parent 2:0 protocol ip prio 1 tcindex ".
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"mask 0xf0 shift 4 pass_on\n";
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for $class (1..4) {
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print "\n# --- AF Class $class specific setup---\n";
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$AFrate=sprintf("AF%drate",$class);
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print "$TC class add $DEV parent 2:0 classid 2:$class cbq ".
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"bandwidth $linerate rate $rate_table{$AFrate} avpkt 1000 prio ".
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(6-$class)." bounded allot 1514 weight 1 maxburst 21\n";
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print "$TC filter add $DEV parent 2:0 protocol ip prio 1 handle $class ".
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"tcindex classid 2:$class\n";
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print "$TC qdisc add $DEV parent 2:$class gred setup DPs 3 default 2 ".
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"$GRIO\n";
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#
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# per DP setup
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#
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for $drop (1..3) {
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print "\n# --- AF Class $class DP $drop---\n";
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$dscp = $class*8+$drop*2;
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$tcindex = sprintf("1%x%x",$class,$drop);
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print "$TC filter add $DEV parent 1:0 protocol ip prio 1 ".
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"handle $dscp tcindex classid 1:$tcindex\n";
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$prob = $drop*0.02;
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if ($GRIO) {
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$gprio = $drop+1;
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print "$TC qdisc change $DEV parent 2:$class gred limit 60KB min 15KB ".
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"max 45KB burst 20 avpkt 1000 bandwidth $linerate DP $drop ".
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"probability $prob ".
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"prio $gprio\n";
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} else {
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print "$TC qdisc change $DEV parent 2:$class gred limit 60KB min 15KB ".
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"max 45KB burst 20 avpkt 1000 bandwidth $linerate DP $drop ".
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"probability $prob \n";
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}
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}
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}
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#
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#
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print "\n#------BE Queue setup------\n";
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print "$TC filter add $DEV parent 1:0 protocol ip prio 2 ".
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"handle 0 tcindex mask 0 classid 1:1\n";
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print "$TC class add $DEV parent 2:0 classid 2:$beclass cbq ".
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"bandwidth $linerate rate $berate avpkt 1000 prio 6 " .
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"bounded allot 1514 weight 1 maxburst 21 \n";
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print "$TC filter add $DEV parent 2:0 protocol ip prio 1 handle 0 tcindex ".
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"classid 2:5\n";
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print "$TC qdisc add $DEV parent 2:5 red limit 60KB min 15KB max 45KB ".
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"burst 20 avpkt 1000 bandwidth $linerate probability 0.4\n";
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