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Old 03-07-2016, 08:02 PM   #1
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Question Virtual Bridge/Tap

So I posted this over in the networking forums and it's been a few days and I haven't heard a reply, so I'm trying my question here.

I'm on Fedora 22 and I have libvirtd that I've been running on it. I was looking at the devices and there was a virbr0 and a virbr0-tap. Is there a concise article about how these worked? I've googled, but can't find anything very clear and it doesn't make a lot of sense to me.

The issue I have is I disconnected both the virbr0 and virbr0-tap in nmcli. virbr0 came back on a reboot, but the virbr0-tap is missing. Now when I start up my VMs they can't get out to the internet. So I'm guessing the virbr0-tap connects to the actual NIC, but how do I get that back?
Old 03-07-2016, 10:03 PM   #2
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So I'm guessing the virbr0-tap connects to the actual NIC, but how do I get that back?
Not necessarily, tap interfaces are virtual interfaces created by vnet. You will only need to reconfigure this virtual bridge. To make story short you may get between the lines by reading this.

Hope that helps. Good luck and enjoy.

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Old 03-19-2016, 03:52 PM   #3
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This issue is now resolved. Thanks to malekmustaq for supplying the link to the answer. The actual page I needed was

You can use virt-manager to create a new connection. To get this to work I did the following:

Start virt-manager - Edit - Connection Details - Hit the + symbol to create a new connection - follow the steps to create a new connection.

Open the VM - Show virtual hardware details - NIC - Network source - choose the new network devices.


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