HELP:Regarding iANS test using netperf

HELP:Regarding iANS test using netperf

Hi,
As part of our project we needto use netperf tool to check the iANS's performance.Here comes the topology.

IO SERVER-----------(two kilomega twisted pair --------CISCO4506
(with large storage) wire,bonding by iANS) | | |
| | |
| | |
| | |
One of client node------(single kilomega twisted pair)--------- | |
One of client node------(single kilomega twisted pair)----------- |
. . . |
. . . |
. . . |
One of client node-----(single kilomega twisted pair)--------------

*******************************************************************

First I test one I/O server to one client node,the result as below
(IO server set to be test-server)

[root@rack64 src]# netperf -H 192.168.77.8 -l 60
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to xinnode3 (192.168.77.8) port 0 AF_INET
Recv Send Send
Socket Socket Message&nbsp
; Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec

87380 16384 16384 59.99 904.44

That looks like OK.

But when I try to use two client nodes 'netperf' the test-server in the same
time ,the results comes like this :

[root@rack61 netperf-2.4.1]# netperf -H 192.168.77.8 -l 60
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to xinnode3 (192.168.77.8) port 0 AF_INET
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec

87380 16384 16384 59.99 470.13

[root@rack60 netperf-2.4.1]# netperf -H 192.168.77.8 -l 60
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to xinnode3 (192.168.77.8) port 0 AF_INET
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec

87380 16384 16384 60.00 473.04

************************************************************
The I/O server suppose to be a powerfull one which can provide 2000 bits/sec
but according to the test result,it just about 940 bits/sec.

what can I do ?

(I am not good at English , so ,please forgive me)

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