What I can tell you for sure is that it is not related to IMQ at all. I've already experienced this traffic rate "duplication" behavior on "only egress" shapping machines but couldn't find its source.
Anybody else?
Andre
Yacine wrote:
Hi,
I have a default class for my un-marked traffic (prio 5) and a prio 0 class for the important stuff, but I do not understand why my download traffic is duplicated in both.
It work fine for my upload traffic (same setting except the red class but I have the same result if I create an esfq instead).
Any comments/information will be appreciated.
Below my config :
tc commands from my scirpt : # TC on my download link tcdownload () { tc qdisc add dev $TC_D_INT root handle 1: htb default 99 debug $HTB_DEBUG tc class add dev $TC_D_INT parent 1: classid 1:1 htb rate ${D_LIMIT}kbit
# VOIP class have the highest priority tc class add dev $TC_D_INT parent 1:1 classid 1:10 htb \ rate ${VOIP}kbit ceil ${D_LIMIT}kbit prio 0 tc qdisc add dev $TC_D_INT parent 1:10 handle 10: esfq perturb 10 hash dst limit 8 tc filter add dev $TC_D_INT parent 1: prio 0 protocol ip handle 10 fw flowid 1:10
# shape everything at $D_LIMIT minus $VOIP speed tc class add dev $TC_D_INT parent 1: classid 1:2 htb \ rate $[$D_LIMIT-$VOIP]kbit ceil ${D_LIMIT}kbit
# high prio class 1:20 to low prio class 1:99 (default) tc class add dev $TC_D_INT parent 1:2 classid 1:20 htb rate $[D_LIMIT-$VOIP]kbit prio 1 tc class add dev $TC_D_INT parent 1:2 classid 1:99 htb rate $[D_LIMIT-$VOIP]kbit prio 5
# all get Enchanced Stochastic Fairness (depending on dst ip), excet the default class (red): tc qdisc add dev $TC_D_INT parent 1:20 handle 20: esfq perturb 10 hash dst # Red setting /5 to make latency 200ms RED_MAX=$[($D_LIMIT*1000/8)/5] RED_MIN=$[$RED_MAX/3] RED_LIMIT=$[$RED_MAX*8] RED_AVPKT=1000 tc qdisc add dev $TC_D_INT parent 1:99 handle 99: red bandwidth ${D_LIMIT} \ probability 0.02 limit ${RED_LIMIT} min ${RED_MIN} max ${RED_MAX} \ avpkt ${RED_AVPKT} burst $[((2*$RED_MIN)+($RED_MAX))/(3*$RED_AVPKT)] ecn
# setup $IPTABLES hooks tc filter add dev $TC_D_INT parent 1: prio 1 protocol ip handle 20 fw flowid 1:20 tc filter add dev $TC_D_INT parent 1: prio 5 protocol ip handle 99 fw flowid 1:99 }
# tc -s -d class show dev imq1 class htb 1:99 parent 1:2 leaf 99: prio 5 quantum 1024 rate 80Kbit ceil 80Kbit burst 1701b/8 mpu 0b cburst 1701b/8 mpu 0b level 0 Sent 114868 bytes 2209 pkts (dropped 0, overlimits 0) rate 2569bps 49pps lended: 2209 borrowed: 0 giants: 0 tokens: 132320 ctokens: 132320
class htb 1:1 root rate 192Kbit ceil 192Kbit burst 1844b/8 mpu 0b cburst 1844b/8 mpu 0b level 7 Sent 114857 bytes 2209 pkts (dropped 0, overlimits 0) rate 2658bps 51pps lended: 0 borrowed: 0 giants: 0 tokens: 59900 ctokens: 59900
class htb 1:10 parent 1:1 leaf 10: prio 0 quantum 1433 rate 112Kbit ceil 192Kbit burst 1742b/8 mpu 0b cburst 1844b/8 mpu 0b level 0 Sent 114857 bytes 2209 pkts (dropped 0, overlimits 0) rate 2658bps 51pps lended: 2209 borrowed: 0 giants: 0 tokens: 96857 ctokens: 59900
class htb 1:2 root rate 80Kbit ceil 192Kbit burst 1701b/8 mpu 0b cburst 1844b/8 mpu 0b level 7 Sent 115684 bytes 2218 pkts (dropped 0, overlimits 0) rate 2764bps 53pps lended: 0 borrowed: 0 giants: 0 tokens: 132320 ctokens: 59900
class htb 1:20 parent 1:2 leaf 20: prio 1 quantum 1024 rate 80Kbit ceil 80Kbit burst 1701b/8 mpu 0b cburst 1701b/8 mpu 0b level 0 Sent 816 bytes 9 pkts (dropped 0, overlimits 0) rate 20bps lended: 9 borrowed: 0 giants: 0 tokens: 127200 ctokens: 127200
# tc -s -d qdisc show dev imq1 qdisc red 99: limit 38400b min 1600b max 4800b ecn ewma 1 Plog 18 Scell_log 22 Sent 3612535 bytes 68768 pkts (dropped 1, overlimits 1) marked 0 early 1 pdrop 0 other 0
qdisc esfq 20: quantum 1000b limit 128p flows 128/1024 perturb 10sec hash: dst Sent 26055 bytes 300 pkts (dropped 0, overlimits 0)
qdisc esfq 10: quantum 1000b limit 8p flows 128/1024 perturb 10sec hash: dst Sent 3569131 bytes 68642 pkts (dropped 0, overlimits 0)
qdisc htb 1: r2q 10 default 99 direct_packets_stat 24 ver 3.16 Sent 7209229 bytes 137739 pkts (dropped 1, overlimits 364)
# iptables -t mangle -L Chain PREROUTING (policy ACCEPT) target prot opt source destination IMQ all -- anywhere anywhere IMQ: todev 1 pretos all -- anywhere anywhere tcpre all -- anywhere anywhere
Chain INPUT (policy ACCEPT) target prot opt source destination
Chain FORWARD (policy ACCEPT) target prot opt source destination IMQ all -- anywhere anywhere IMQ: todev 0 tcfor all -- anywhere anywhere
Chain OUTPUT (policy ACCEPT) target prot opt source destination outtos all -- anywhere anywhere tcout all -- anywhere anywhere
Chain POSTROUTING (policy ACCEPT) target prot opt source destination
Chain outtos (1 references) target prot opt source destination
Chain pretos (1 references) target prot opt source destination
Chain tcfor (1 references) target prot opt source destination MARK udp -- anywhere anywhere udp dpts:8000:30000 MARK set 0xa MARK udp -- anywhere anywhere udp dpts:5060:5069 MARK set 0xa MARK udp -- anywhere anywhere udp dpts:2427:2436 MARK set 0xa MARK tcp -- anywhere anywhere tcp dpt:ssh MARK set 0x14 MARK tcp -- anywhere anywhere tcp dpt:webmin MARK set 0x14 MARK icmp -- anywhere anywhere MARK set 0x14 MARK tcp -- anywhere anywhere tcp flags:!SYN,RST,ACK/ACK MARK set 0x14 MARK tcp -- anywhere anywhere tcp flags:SYN,RST,ACK/ACK length 0:128 TOS match !Normal-Service MARK set 0x14 MARK all -- anywhere anywhere MARK match 0x0 MARK set 0x63
Chain tcout (1 references) target prot opt source destination
Chain tcpre (1 references) target prot opt source destination MARK udp -- anywhere anywhere udp dpts:8000:30000 MARK set 0xa MARK udp -- anywhere anywhere udp dpts:5060:5069 MARK set 0xa MARK udp -- anywhere anywhere udp dpts:2427:2436 MARK set 0xa MARK tcp -- anywhere anywhere tcp dpt:ssh MARK set 0x14 MARK tcp -- anywhere anywhere tcp dpt:webmin MARK set 0x14 MARK icmp -- anywhere anywhere MARK set 0x14 MARK tcp -- anywhere anywhere tcp flags:!SYN,RST,ACK/ACK MARK set 0x14 MARK tcp -- anywhere anywhere tcp flags:SYN,RST,ACK/ACK length 0:64 TOS match !Normal-Service MARK set 0x14 MARK all -- anywhere anywhere MARK match 0x0 MARK set 0x63
# tc -V tc utility, iproute2-ss001007
# uname -r 2.4.26
# iptables --version iptables v1.2.9
Thank you, Yacine.
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