use simultaneously two network connections

nima0102 · 10-28-2007, 05:15 AM

Hi everybody
I intend to use simultaneously two network connections, One dial up and GPRS.
this is meant that if per connection have 5 KB/s speed, I want to download with 10 KB/s or browse with 10 KB/s, of course I can specify route path separately with ROUTE command but I can not create Load balance in network connection
please assist me in doing this task
I am sincerely grateful for your help.

rossonieri#1 · 10-28-2007, 11:35 AM

hi,

cant be done that way.
each default route from your 2 connections will have their own gateway,
and will still have DL of 5k each. Load Balancing what you will have is when the first connection having heavy traffic - then - the other will help it to route the next traffic,
or can be in which interface is closer to the destination.

HTH.

nima0102 · 10-28-2007, 01:50 PM

Quote:

Originally Posted by rossonieri#1

hi,

Load Balancing what you will have is when the first connection having heavy traffic - then - the other will help it to route the next traffic,
or can be in which interface is closer to the destination.

HTH.

very thanks for you attention
well,now,what configurations or setting up must I do?
I am sincerely grateful for your help

osor · 10-28-2007, 04:47 PM

Quote:

Originally Posted by nima0102

well,now,what configurations or setting up must I do?

As stated by rossonieri, your bandwidth won’t magically increase to be the sum of your uplinks. You can, however, define routes for the multiple uplinks so they are used in a round-robin (or some other algorithm) fashion. For more info, read here.

rossonieri#1 · 10-28-2007, 05:47 PM

OK nima,

(assuming you are using redhat and have all connections established)
first - go to the console and do the following :
check all interfaces : ifconfig -a

you should see you have 2 ppp connection : ppp0 and ppp1

check the route your machine has : netstat -rn

you should see something like this :

Code:

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 eth1
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth1
0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0 eth1

since i dont have dial interface (ppp) the we assume eth0=ppp0 and eth1=ppp1.

you see that we only have 1 default route via dev eth1

adding another default route :

Code:

route add default gw 192.168.1.1 dev eth0

then we will have :

Code:

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0 eth0
0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0 eth1

this way - your linux box will automatically load balance passing traffic to the internet. you can check that using ifconfig again - see the TX and RX value - you should see they will both change.

HTH.