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jackal_br
n00b
Joined: 31 Mar 2004
Posts: 18
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 Posted: Thu Nov 03, 2005 1:29 am Post subject: Prioritization Traffic HTB+PRIO+TBF |
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After having read about QOS and htb, I'm trying to build a script wich uses the PRIO with htb.
My problem is that my uploads is killing my downloads and web browsing freezes constantly while using bittorrent.
So I thought to implement a queue with gives low priority to p2p traffic.
This is my network topology:
Internet <--> cable modem <--> eth0 <--> linux gateway <--> eth1
and the script that I builded, based here http://www.voip-info.org/wiki/view/QoS+with+Linux+using+PRIO+and+HTB
| Code: |
#!/bin/bash
TC=/sbin/tc
IPTABLES="/sbin/iptables"
DOWNLINK="270"
UPLINK="220"
DEV="eth0"
RATE=270
CEIL=250
if [ "$1" = "status" ]
then
$TC -s qdisc ls dev $DEV
$TC -s class ls dev $DEV
exit
fi
# clean existing down- and uplink qdiscs, hide errors
$TC qdisc del dev $DEV root 2> /dev/null > /dev/null
$TC qdisc del dev $DEV ingress 2> /dev/null > /dev/null
if [ "$1" = "stop" ]
then
exit
fi
###### uplink
$TC qdisc add dev ${DEV} root handle 1: tbf rate ${UPLINK}kbit latency 50ms burst 1540
$TC qdisc add dev ${DEV} parent 1: handle 10: prio
$TC qdisc add dev ${DEV} parent 10:1 handle 100: pfifo
$TC qdisc add dev ${DEV} parent 10:2 handle 200: htb
$TC qdisc add dev ${DEV} parent 10:3 handle 300: sfq perturb 10
$TC class add dev ${DEV} parent 200: classid 200:1 htb rate ${UPLINK}kbit
$TC class add dev ${DEV} parent 200:1 classid 200:10 htb rate $[25*$UPLINK/100]kbit ceil ${CEIL}kbit prio 1
$TC class add dev ${DEV} parent 200:1 classid 200:20 htb rate $[30*$UPLINK/100]kbit ceil ${CEIL}kbit prio 2
$TC class add dev ${DEV} parent 200:1 classid 200:30 htb rate $[25*$UPLINK/100]kbit ceil ${CEIL}kbit prio 3
$TC class add dev ${DEV} parent 200:1 classid 200:40 htb rate $[20*$UPLINK/100]kbit ceil ${CEIL}kbit prio 4
$TC qdisc add dev ${DEV} parent 200:10 handle 2001: sfq perturb 10
$TC qdisc add dev ${DEV} parent 200:20 handle 2002: sfq perturb 10
$TC qdisc add dev ${DEV} parent 200:30 handle 2003: sfq perturb 10
$TC qdisc add dev ${DEV} parent 200:40 handle 2004: sfq perturb 10
# Band 1
#
# To speed up downloads while an upload is going on, put ACK packets in
# the interactive band:
$TC filter add dev ${DEV} parent 10:0 protocol ip prio 2 u32 \
match ip protocol 6 0xff \
match u8 0x05 0x0f at 0 \
match u16 0x0000 0xffc0 at 2 \
match u8 0x10 0xff at 33 \
flowid 10:1
# VoIP traffic always get first in line (my ATA tags them with TOS 0x68 or 0xb8)
#$TC filter add dev ${DEV} parent 10:0 prio 3 protocol ip u32 \
# match ip tos 0x68 0xff \
# flowid 10:1
#$TC filter add dev ${DEV} parent 10:0 prio 4 protocol ip u32 \
# match ip tos 0xb8 0xff \
# flowid 10:1
# Band 3
#
# p2p
#$TC filter add dev ${DEV} parent 10:0 protocol ip prio 2 handle 1 fw \
# classid 10:3
#Band 2
#
# All non urgent traffic on band 2
$TC filter add dev ${DEV} parent 10:0 protocol ip prio 3 u32 \
match ip src 0.0.0.0/0 \
flowid 10:2
# TOS Minimum Delay
$TC filter add dev ${DEV} parent 200: protocol ip prio 10 u32 \
match ip tos 0x10 0xff \
flowid 200:10
# ICMP (ip protocol 1) in the interactive class
$TC filter add dev ${DEV} parent 200: protocol ip prio 11 u32 \
match ip protocol 1 0xff \
flowid 200:10
# dns
$TC filter add dev ${DEV} parent 200: protocol ip prio 12 u32 \
match ip sport 53 0xffff \
flowid 200:10
# ssh
$TC filter add dev ${DEV} parent 200: protocol ip prio 13 u32 \
match ip sport 22 0xffff \
flowid 200:10
# vnc
$TC filter add dev ${DEV} parent 200: protocol ip prio 20 u32
match ip sport 5900 0xffff \
flowid 200:20
# http
$TC filter add dev ${DEV} parent 200: protocol ip prio 30 u32
match ip sport 80 0xffff \
flowid 200:30
# rest is 'non-interactive' ie 'bulk' and ends up in the default queue
$TC filter add dev ${DEV} parent 200: protocol ip prio 40 u32 \
match ip src 0.0.0.0/0 \
flowid 200:40
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Is not working as planned. The p2p uploads keeps high. Why interactive traffic isn't gets sent first ?
It seems that PRIO is not working, or the queue is get empty to fast.
I don't know if I got the wrong ideia about the filters.
Any help I would appreciate. |
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jackal_br
n00b
Joined: 31 Mar 2004
Posts: 18
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| Posted: Thu Nov 03, 2005 1:41 am Post subject: |
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this part of the code I comment for some tests but I'm using it uncomment together whith iptables MARKS that seem to be putting the packets in the right band (10:3).
but prio doesn't makes its job.
| Code: |
# p2p
#$TC filter add dev ${DEV} parent 10:0 protocol ip prio 2 handle 1 fw \
# classid 10:3
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Any body? |
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jackal_br
n00b
Joined: 31 Mar 2004
Posts: 18
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| Posted: Sat Nov 05, 2005 5:56 pm Post subject: |
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I made some tests here with a more simple version:
| Code: |
# clean eth0
tc qdisc del dev eth0 root
tc qdisc add dev eth0 root handle 1: tbf rate 160kbit latency 50ms burst 1540
tc qdisc add dev eth0 parent 1: handle 10: prio
tc qdisc add dev eth0 parent 10:1 handle 100: pfifo
tc qdisc add dev eth0 parent 10:2 handle 200: htb
tc qdisc add dev eth0 parent 10:3 handle 300: sfq
tc class add dev eth0 parent 200: classid 200:1 htb rate 160kbit
# p2p
tc filter add dev eth0 parent 10: protocol ip prio 2 handle 1 fw classid 10:3
tc filter add dev eth0 parent 10: protocol ip prio 3 u32 match ip src 0.0.0.0/0 flowid 10:2
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This works great. P2P traffic comes close to zero when upload a file with ftp. (exactly what I want)
But when I add a new filter to use the 200:1 class, like this:
| Code: |
tc filter add dev eth0 parent 200: protocol ip prio 20 u32 match ip src 0.0.0.0/0 flowid 200:1
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the packages really goes to 200:1 as Its shows here:
# tc -s class ls dev eth0
.
.
.
class htb 200:1 root prio 0 rate 160000bit ceil 160000bit burst 1679b cburst 1679b
Sent 2306549 bytes 2176 pkt (dropped 0, overlimits 0 requeues 0)
rate 160520bit 19pps backlog 0b 66p requeues 0
lended: 4049 borrowed: 0 giants: 0
tokens: -149053 ctokens: -149053
but now, prioritization traffic does not woks anymore, band 10:2 does not gets more priority than 10:3.
I don't know if I'm being clearly.
Htb can be a class of prio or just the opposite ?
Please somebody help me. |
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Moloch
Apprentice
Joined: 17 Mar 2003
Posts: 293
Location: Albuquerque, NM, US
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| Posted: Wed Jan 04, 2006 11:24 pm Post subject: |
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I have the exact same issues. I've hacked away at my own script so much it just became a mess. So I really have nothing to show for. Lately I've been using the tc settings that come bundled with shorewall 3.x, but there is no improvement. I really just want a straight priority setup. Where anything with a lower priority can be starved by traffic with a higher priority. It seems qos is more designed to give every queue a chance even with a lower priority. When I give the lower quality queues a guaranteed rate of something like 2k but the ceil rather high. It doesn't seem to cut it off properly at the guaranteed rate.
My next step is to see if I can get better results by tweaking cbq. Not sure when I'll get a chance though.
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Understanding is a three-edged sword: your side, their side, and the truth. --Kosh
1010011010 |
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