[wackomoo]

Appreciate the help, Myatu, but not sure I understand.

To clarify:
94.23.x.x is my main IP (Proxmox), 87.98.x.x is my fail-over (Guest).

All I want is to have one Guest OS (Windows) that is connected to the internet and accessible via the fail-over (87.98.x.x) IP. Keep it simple for now
Doing only this and nothing else, do I need vmbr1 at all or can I forget about it?

1. In windows/guest, should I be setting my fail-over IP on the ("fake") Realtek NIC? (87.98.x.x)
)
2. In Proxmox/system/index.htm, should:
eth0 - have anything in the ports/slaves?
vmbr0 - have anything in the ports/slaves? Is it correct to have fail-over IP on this?
vmbr1 - has 'dummy0'... Like I asked in my above Q: can I forget about vmbr1 or..?


Walk me through this please and I'll buy you a bottle of wine

[Myatu]

You have already assigned the IP to "vmbr0".

In a correct setup, "vmbr0" is the master and should have the main IP address of the server/host. eth0 is a "slave" of vmbr0, giving it access to the outside world. Any other "slave" of vmbr0 -- that is, any other VM you attach to it with a virtual NIC -- will also have access to the outside world.

If you attach the VM to vmbr1 instead, which does not have any outside access, you essentially create an "internal network" (think of vmbr1 as the company's router linking all workstations together, vmbr0 as the router giving the company's email servers access to the web).

[wackomoo]

Can someone detail the Proxmox network setup for me please?

I have:
Interface Active Ports/Slaves Autostart IP Address Subnet Mask Gateway
eth0 yes 94.23.x.x 255.255.255.0 94.23.x.254
vmbr0 yes 87.98.x.x 255.255.255.255 94.23.x.254
vmbr1 yes dummy0

And in my Win2008R2 guest OS:
Realtek NIC w/ 87.98.x.x 255.255.255.255 94.23.x.254 as IP/netmask/gw.

Proxmox server has full internet access and can ping 87.98.x.x. However the guest/windows has no net access and can not ping 94.23.x.x.

Any ideas?