have a Kemp load balancer for a customer that has a lot of websites (Over 600) going through a shared IP to their Web Server (Windows 2012 R2). The Kemp Load Balancer does HTTP health checks to make sure the Web Server is up and accessible. A
few days ago, the Health Checks were failing and it was because the load balancer wasn't able to communicate with the Web Server. As soon as I removed the IP and re-added it on the server, the health checks were able to communicate with the server and
the websites came back up. There were no errors in the log files and I have been researching this problem for a couple days and am stumped. Has anyone experienced anything similar and have an idea why this happened?
It seems like the Windows server just stopped recognizing the static IP and I have never had this happened to me with Servers in the past. Is it possible the sites caused an a overflow of some type on the WebServer?
During this time I also could not ping the Server which is installed as a VM on Hyper-V yet the backup WebServer which is setup the same way only with a different IP, was working perfectly.
Any help would be appreciated and I know there's not much more information but there were not any error logs of any issue for me to provide.