It should work fine with two wifi interfaces, as long as you are accessing two different AP’s.
But I never tried it…

Is this bash file compatible when I use two WiFi interface?in my case, I make 2 APs by using 2 WiFi interfaces with different gw and use 2 clients by using 2 WiFi interfaces which connected to different AP?

Thanks for such a great post. I was looking for a Load balancing post . However, I have a question. will this improve the upload speed as well? I have two ISPs with 0.8 Mbps upload speed. Will that improve it? I use asterisk telephony system, hence require improved upload speed.

Regards.
sayantan

In this case – having the same gateway – my solution won’t work for you…
But it should be possible to adapt it to your setup. The problem is I can’t test it for you here

You might try using “via a.b.c.d” where a.b.c.d is the internal IP address of the NIC connected to your adsl modem, instead of the gateway address.
But – as I said – I have not tried this here…

I tried this script but under my circumstances does not work. I have 2 adsl bridged modems from the same ISP and I connected it via pppoe. The problem is that I have the same default gw for ppp0 and ppp1. When only one link is up it works perfectly but when I start the second and run the script the two links goes “down”(not really because when I shut down one the other begin to work). Do you need more details? Any help will be appreciated.

P.S. I use Slackware too.

gw2=$(route -n | grep $DEV2 | grep ‘^0.0.0.0′ | awk ‘{print $2}’)
if [ "$gw2" == "" ]
then
gw2=$(ifconfig $DEV2 | grep P-t-P | awk ‘{print $3}’ | awk -F: ‘{print $2}’)
fi

I tried dialing using pon with pppd and wvdial. It looks like, they dont add a default route
when it sees another active default route, eth0 interface in this case.