Multi-WLAN configuration

From: Victor Aleo (victor.aleo_at_estudiant.upc.es)
Date: 2002-10-09 01:10:36 UTC


Hi again,

First, thanks a lot for the answers about the timing questions!

I would like to ask how to set up the next wireless network configuration:

  1. Linux-box with 2 WLAN cards (Prism2-2002-05-19). The first card
    (wlan0) is configured as an AP (Master mode) and the second (wlan1) as a
    STA (Managed mode). The Linux-box has an Ethernet device (eth0). By now, I have bridged the wlan0 (AP) with the eth0 without any problems. I get an IP address for the AP by means of DHCP (let's say 120.235.14.50).

But now, I want to use the second WLAN card, wlan1, to act as an STA. This STA must communicate on the "radio" side, of course. I also get an IP address for this STA using DHCP.

The issue is the next: I get an IP for wlan1 from the same subnetwork
(120.235.14.55) and the routing table looks like the following:

Kernel IP routing table 

Destination     Gateway         Genmask                 Flags Metric 
Ref    Use Iface
120.235.14.0     *               255.255.255.128     U     0      
0        0         br0
120.235.14.0     *               255.255.255.128     U     0      
0        0         wlan1
127.0.0.0           *               255.0.0.0                 U     
0      0        0         lo
default         120.235.14.1   0.0.0.0                     UG   0     
0        0         br0
default         120.235.14.1   0.0.0.0                     UG   0     
0        0         wlan1

Therefore, when I tried to connect to the IP address of wlan1
(120.235.14.55) all the traffic was forwarded to the bridge (br0) using
the "wired" side instead of the "wireless" side. Conclusion: the wlan1 device is not used at all!

How can I fixed it to make the Linux-box to forward the packets to wlan1 device instead of the br0 in this case?

Any idea, comment or suggestion will be well received!

Victor

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