lihpc@Legend.com
2002-Nov-06 14:07 UTC
help, strange question about tcp and udp traffic control?
Hi ;
+--------+ +-----------+ +--------+
| server |---------- | linux box |---------------------| Client |
+--------+ +-----------+ +--------+
MY script:
tc-htb3 qdisc del dev eth1 root
ipchains -F
tc-htb3 qdisc add dev eth1 root handle 10: htb default 20 r2q 40
tc-htb3 class add dev eth1 parent 10: classid 10:1 htb rate 50Mbit burst
2000
tc-htb3 class add dev eth1 parent 10:1 classid 10:100 htb rate 12mbit ceil
13mbit prio 1
tc-htb3 class add dev eth1 parent 10:1 classid 10:20 htb rate 38mbit ceil
50Mbit prio 7
ipchains -A fw -s 10.1.1.1 -d 10.1.5.1 -m 100
ipchains -A fw -s 0.0.0.0 -d 0.0.0.0 -j ACCEPT
tc-htb3 filter add dev eth1 protocol ip parent 10:0 prio 1 handle 100 fw
classid 10:100
I''ve find one strange question about traffic control when sending udp
data
and tcp data.
Could you explain it ? thanks
question:
WHEN I measure maximum UDP bandwidth by using "Iperf -1.6 -s -u" in
server
host and "iperf-1.6 -c <server address> -u -b 50m" in client
host, the
bandwidth is 12.1mbit.
OK. work well.
BUT
WHEN I measure maximum TCP bandwidth by using"Iperf -1.6 -s " in
server
host and "iperf-1.6 -c <server address> " in client host, the
bandwidth is
only 3.1mbit.
WHY ?
haipe
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Stef Coene
2002-Nov-06 17:00 UTC
Re: help, strange question about tcp and udp traffic control?
On Wednesday 06 November 2002 15:07, lihpc@Legend.com wrote:> Hi ; > > > > +--------+ +-----------+ +--------+ > > | server |---------- | linux box |---------------------| Client | > > +--------+ +-----------+ +--------+ > > MY script: > > tc-htb3 qdisc del dev eth1 root > ipchains -F > > tc-htb3 qdisc add dev eth1 root handle 10: htb default 20 r2q 40 > > tc-htb3 class add dev eth1 parent 10: classid 10:1 htb rate 50Mbit burst > 2000 > > tc-htb3 class add dev eth1 parent 10:1 classid 10:100 htb rate 12mbit ceil > 13mbit prio 1 > tc-htb3 class add dev eth1 parent 10:1 classid 10:20 htb rate 38mbit ceil > 50Mbit prio 7 > > ipchains -A fw -s 10.1.1.1 -d 10.1.5.1 -m 100 > ipchains -A fw -s 0.0.0.0 -d 0.0.0.0 -j ACCEPT > > tc-htb3 filter add dev eth1 protocol ip parent 10:0 prio 1 handle 100 fw > classid 10:100 > > > > > I''ve find one strange question about traffic control when sending udp data > and tcp data. > Could you explain it ? thanks > > > question: > > WHEN I measure maximum UDP bandwidth by using "Iperf -1.6 -s -u" in server > host and "iperf-1.6 -c <server address> -u -b 50m" in client host, the > bandwidth is 12.1mbit. > OK. work well. > > BUT > WHEN I measure maximum TCP bandwidth by using"Iperf -1.6 -s " in server > host and "iperf-1.6 -c <server address> " in client host, the bandwidth is > only 3.1mbit. > WHY ?I''m not sure, but your burst is way to low. Can you remove the burst parameter from class 10:1 and try again ?? And can you check the tc and ipchains counters so the packets are placed in the queue you want ? Stef -- stef.coene@docum.org "Using Linux as bandwidth manager" http://www.docum.org/ #lartc @ irc.oftc.net _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/