IP FailOver does not work

Hello,
The server I ordered was delivered on Saturday.
I installed (probably with 4x) Proxmox virtualization. The configuration is identical to other 4 servers. When I transfer IPFO to this service, I set up a virtual server with virtual MAC, start installation and after entering IPFO, and further actions the IPFO address is "deaf". At first I thought there was a problem with one IPFO, so I started to put another one on trial with the same result. No IPFO addresses "talk" on this server.

Please help.