First time user - setting up additional IPs on PROXMOX and Windows VM

[GM2024]

We just setup a dedicated server at OVH with Proxmox, and I followed the instructions provided by the OVH support team to setup my additional IP addresses (link - we use an ADVANCE server)

From the virtual machine I’m able to ping the Proxmox host, but I’m unable to reach any Internet IP.

This is how the /etc/network/interfaces file look:

auto enp8s0f0np0
iface enp8s0f0np0 inet static
        address <Proxmox Host Public IP>/32
        gateway 100.64.0.1
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up echo 1 > /proc/sys/ipv4/enp8s0f0np0/proxy_arp

auto vmbr0
iface vmbr0 inet static
        address 192.168.0.1/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0
        up ip route add <Additional IP 1>/32 dev vmbr0
        up ip route add <Additional IP 2>/32 dev vmbr0
        up ip route add <Additional IP 3>/32 dev vmbr0
        up ip route add <Additional IP 4>/32 dev vmbr0

My VM is on Windows, and the article linked above doesn’t provide any specific instructions but based on what I saw I simply assigned it 192.168.0.2 as primary IP, and added of the additional IPs.

I’m able to ping 192.168.0.1 just fine, but any other IP on the public internet is unreachable. I tried using 100.64.0.1 as gateway, using the additional public IP as primary IP, but no luck…

Can anyone here offer suggestions on what should be my next step to troubleshoot this?

Thanks

 

[GM2024]

UPDATE: I solved the issue by using an IP block instead of additional IPs, and using the instructions I found here: https://support.us.ovhcloud.com/hc/...work-on-Proxmox-VE-with-ADVANCE-Gen-3-Servers

It mentions that "On an ADVANCE Gen 3 server, it is not possible to operate Additional IPs in bridged mode (via virtual MACs). Configuring Additional IPs via the vRack is necessary."