From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Kierdelewicz <marek@piasta.pl>
Subject: Re: ip forwarding issue with dual gateway
Date: Mon, 9 Nov 2009 09:01:02 +0100
Message-ID: <20091109090102.6508ed37@catlap>
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To: "J. Bakshi" <joydeep@infoservices.in>
Cc: netfilter@vger.kernel.org

> Hello,

Hello Bakshi

> I have two lan cards in my server which is used to share internet
> connection with the help of iptables. The config is as below

Read the following paragraph of LARTC-howto: [1].

With your current iptables config it's enough to change default gateway
and you'll use another upstream link (for failover you can do it by
detecting gateway-down event with eg. apinger [2]). You can
do load-balancing with policy routing [1].

[1] http://lartc.org/howto/lartc.rpdb.htm
[2] http://apinger.jajcus.net/trac/

cheers,
Marek