Athelink thank you. But our problem is different and interesting. We tested 2 day zeroshell.
Topology
Eth0= 192.168.1.15
Eth1= 192.168.0.254 cablenet 10 mbit
Eth2= 192.168.2.254 ADSL 8 mbit
Net balancer module
Cable= 192.168.0.1 weight=1 active
ADSL= 192.168.2.1 weight=1 active
Nat= eth0,eth1,eth2
Without no user use internet AND we tested the speed. Sometimes the result of these speed test result we have sum two line (18 mbit), sometimes we can see single line bandwidth. (10 or 8)
When we see that 10 or 8 lines works we actually see that other line work. What is our problem? Why we could not see everytime that these 2 lines sum work ( 18 mbit)