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Old 07-19-2004, 05:02 AM   #1
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Registered: Jul 2004
Posts: 1

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Two exits, one router, one lan. Would like to configure load balance.

Current configuration:

- One LAN (
- One exit to the world (one ADSL doing MASQ)
- One windows machine working as gateway between LAN and ADSL

Near future:

- Another exit (not yet sure how will it be, but hope it has a private IP for the inside and a public for the outside)
- A linux box to work as a router, so the windows machine stops doing that job.

So I will have:
LAN--->linux-router----> old-ADSL -------------> INTERNET
              --------> NEW-connection -------> INTERNET
I was thinking in configuring the linux machine with two ethernets, but I have read there can be problems if I dont use one ethernet for each exit.

I would like using eth0 for the LAN side of the router, and eth1 for both the exits. Or eth0 for LAN and ADSL, and eth1 for the new connection if it is a direct connection with public IP.

My question is: Is it posible to configure it this way or will I need 3 ethernets (1 for LAN, 1 for ADSL and 1 for the new connection)?

Idea behind this is using mainly the new connection while keeping the ADSL as a backup if the new one fails. Also, incoming mail enters through ADSL, so I wanna keep it working.

Thanx in advance.
Old 07-19-2004, 09:24 AM   #2
Registered: Jul 2004
Posts: 85

Rep: Reputation: 15
Some time ago, I had done some basic investigation into this using the Linux Virtual Server project, and attempting to load balance my HTTP traffic. I was unsuccessful at that time, though I haven't tried it recently. I think that the reason why I was unsuccessful was because of the browser potentially needing a structured packet return, not wildly different packets, entering and exiting over two separate paths.

However, as a disclaimer, I haven't looked into it recently. I won't claim to have been 100% on top of things when I did it.


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