I have noticed what seems to me to be a quirk, but wanted to see if this is correct behaviour, or perhaps my configuration. I am running a test install ov oVirt 3.3.2 in an all-in-one install. My test box only has one physical NIC, so I am using that for management/external network access, and I have create a dummy interface called "dummy_0" to be used for the VMs. I created four networks, each assigned their own VLAN (I am wanted to simulate a "real-world" . I added the first network ("VLAN001") to "dummy_0" with no problem (I was able to save the configuration). The system created the "dummy_0.1". When I tried to add another network ("VLAN002") to "dummy_0" and save it, I got the following error: --- START --- Error while executing action: local_host: Cannot setup Networks. The following Network Interfaces were specified more than once: dummy_0.1. --- END --- I found that in the "Setup Host Network" if I dragged "VLAN001" off dummy_0 to the right under "Required", and left "VLAN002" on "dummy_0", I could save it, and "VLAN001" appeared to remain active on the host. Indeed, when I went back into "Setup Host Network", both "VLAN001" and "VLAN002" were showing up on "dummy_0". However, if I highlight "VLAN002" under "Networks" and click on the "Hosts" tab, the "Network Interface" is showing a red down arrow, indicating it is not up. The "Network Interface" for "VLAN001" is a green up arrow. I have refreshed several times and at this point in time, have left it for almost thirty minutes, but it remains as a red down arrow. The same is true for the other two networks I tried adding: I was able to add them as above, but they are also showing a red down arrow. My questions: 1.) Is doing what I had to do to add additional networks to an interface normal, or is it a quirk of using a dummy interface? 2.) Any ideas why my additional networks are showing a red down arrow? Again, maybe a quirk of using a dummy interface? I am going to leave it overnight and see what happens (maybe some background process needs to run??), but if that does not work, I am sure I can scrounge up another NIC in the next couple of days and install it into my test server to see if it does the same thing. Thanks, in advance. -Alan