To prevent this you alias the 10.1.1.1 address (cluster address as it is called) on the loopback adapter of the www1 and www2 servers and trick them into to thinking that 10.1.1.1 is a valid address ...

I setup a a router in GNS3 with the loopback adapter and cloud connected to it. Now i setup everything up from the guides I have followed and from my physical PC i can ping the loopback interface and ...