Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm setting up a load balancer with failover and I'm confused on how to properly set it up. The load-balancer is balancing web traffic to web-servers on a LAN network.

My setup is the following:

I have one incoming external IP address, that ethernet cable goes to a switch. One output from the switch is going to load_balancer_1 and the second output going to load_balancer_2. Then there is heartbeat between the two load-balancers using a dedicated ethernet cable between the two computers. And finally there is a third ethernet cable which connects the load balancer to a LAN switch. And that LAN switch is connected to the web-servers.

So I need 3 ethernet ports on both load-balancers? Is this the best setup for HA load-balancing? And I'm using HAproxy

share|improve this question

This is a great set up.

Using a dedicated interface for the fail-over syncing and monitoring is a good step. You want to be able to have both WAN interfaces see each other, both LAN interfaces see each other and a dedicated fail-over & sync interface, like you have, for an optimal HA solution.

I have set this up before with HAProxy and keepalived for (VRRP) IP failover. It works just dandy.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.