help, strange question about traffic control?

Linux Advanced Routing and Traffic Control

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Hi ;



    +---------+           +-----------+                     +---------+
    | server1 |---------- | linux box |---------------------| Client 1|
    +---------+    |      +-----------+         |           +---------+


                   |                            |


    +---------+----|                            |----  +---------+
    | server2 |                                        | Client 2|
    +---------+                                        +---------+







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

tc-htb3 class add dev eth1 parent 10:1 classid 10:100 htb rate 10mbit ceil
15mbit prio 1
tc-htb3 class add dev eth1 parent 10:1 classid 10:20 htb rate 3mbit ceil
50Mbit prio 7

ipchains -A fw -s <SERVER1> -d <CLIENT1> -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 of classid 10:100 .
Could you explain it ? thanks


question:

WHEN i send packets of classid 10:20 at 5mbit from "server2" to "client2" ,
 I measure maximum TCP bandwidth of classid 10:100 by using"Iperf -1.6 -s "
in server host and "iperf-1.6 -c <server1 address>  " in client1 host, the
bandwidth of classid 10:100 is only 3.5mbit.

BUT when i stop sending packets of classid 10:20 t from "server2" to
"client2" ,I measure maximum TCP bandwidth of classid 10:100 by using"Iperf
-1.6 -s " in server host and "iperf-1.6 -c <server1 address>  " in client1
host, the bandwidth of classid 10:100 is o 12.1mbit.
OK.  work well.

WHY ?


haipe





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