We share a router with another organization for Internet access. Their router has started responding to arp requests for our server's IP address which is causing massive problems. We've been unable to get their vendor to resolve the issue with the router after several days.
I'm wondering if we put in a Layer 3 switch, would that block those ARP broadcasts from reaching their router. I'm guessing that it would, but I don't have any first hand experience with using or configuring a layer 3 switch.
Opinions and advice welcome.