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Old 08-31-2006, 05:30 AM   #1
ERBRMN
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Registered: Mar 2005
Location: Japan
Distribution: TurboLinux, RHEL, SUSE
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Wireless rate, two interfaces on single node. (help)


HI all

I need advice for wireless data transmision and wireless rate when I use 2 wireless interface on one computer.

My wireless network is very simple, you can see it following link :

http://www.geocities.com/erbrmn/WirelessNetwork.jpg

From the network topology, There are two notes which confiured one wireless interface (each configured Access Point),
one notebook which configured two wireless interfaces (using PCMCIA and CF). Both interface configured managed mode.
(wlan0 of C node is connected A access point, wlan1 of C node connected B access point)

Wireless drivers: Madwifi-old driver for Atheros chipset based wireless network cards
Hostap and Orinoco drivers for Prism 2/3 based wireless network cards.
Rate : 11M
Operation mode : Infra

----------

My experiment:

I am using the Iperf (http://dast.nlanr.net/Projects/Iperf/) which is measure network performance.
I am sending package from A and B nodes to C node different network using different wireless.

Problem:

When I measure TCP/UDP packages between A node and wlan0 of C node, rate was MAX rate (6Mb/s - 7Mb/s).
But when I use both wireless interface of C node (between A node and wlan0 of C, B node and wlan1 of C node), we could not get MAX rate both interface.
It means , during the measurement one of the interface rate of C is increased, other interface rate is decreased ,
The total wireless rate of this two interface are still 6Mb/s - 7Mb/s , like when I used one interface.
But I want to get MAX rate (6Mb/s - 7Mb/s) each interface same time.

How can I get MAX rate on both wireless interfaces of C node same time ?

.
 
  


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