hi there
i found out, with my internal NIC it's working. But the second NIC (4 Port Ethernet Card) will not work :( but in the old "Server" they worked...
Internal NIC (working):
root@proxmox:~# ethtool -i enp9s0
driver: r8169
version: 5.11.22-1-pve
firmware-version: rtl8168h-2_0.0.2 02/26/15...