[KLUG Members] Load Balancing Solution for Multiple ISP Link

[Adam Tauno Williams]

> Here is typical requirment 
> We need a a Load Balancing Router for aggregating the bandwidth of our
> multiple ISP Links with Failover and Redundancy feature. 

You need to setup a BGP feed and zebra/quagga on the LINUX box acting as
the router.

> This Linux based Load Balancing Router should have the functionality
> described below: 
> 1. This router should act as a gateway for our LAN and all our internet
> traffic should be routed through this. 
> 2. In the normal condition when All the ISP links are active, it will
> distribute the internet traffic between the all links so that all the
> ISP links can be used equally or in a pre-determined proportion, thereby
> achieving Load Balancing. 
> 3. In case of failure of one of the ISP Links, it will do an automatic
> transfer of entire internet traffic to the other links within a couple
> of seconds, thereby providing Failover as well as Redundancy. 
> 4. The router shall also restore load balanced status as in (1) as soon
> as the failed link becomes alive again. 
> 5. The incoming traffic for our application and other servers will be
> divided between the all Internet links and in case of failure of some of
> the links, it wil be automaticaly shifted to the other link. 
> The load balanced status shall be restored upon restoration of the
> failed Internet link. You shall implement a Dynamic DNS for our domain
> to achieve the features described in (5). 
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