what is the BEST PRACTICE in load balacing internet traffic using 2 ISP's.
-web/mail servers are hosted
-single internet router
-Public IP address inside the internet router
-half of the internet traffic will go to the ISP1
-other half will go to ISP2
you cannot easily load balance with public address "inside". For this, you need BGP, and both ISP willing to route the network block you've been assigned (likely, by one ISP).
If you are OK with private addresses, you can load balance using NAT and that does not requires BGP.
Hope this helps, please rate post if it does!