I'm running some HP Proliant DL360 G6 servers with vmware esxi, and I have a Synology Diskstation appliance, all connected to a layer3 switch "Cisco Catalyst 4500" in a specific vlan and every server has its own static ip address with no dhcp pools configured in this network.
The problem is that sometimes when I call the Diskstation ip address a vmware server, specifically the first server, responds although it has its own static ip and doesn't conflict with any other server.
Sometimes the Diskstation responds and it works.
What could the cause be? it first looked to me like an ip conflict or something cause of observed ip range in vmware, but still can't see how to solve this problem.