Re: [libvirt-users] Remove Virtual bridge and DNSMASQ

(in before Eric for this :-) Please don't top-post in responses on this list (or most other technical lists). Posting your responses in the context of the previous message makes it much easier for followups that want to respond to points from several messages at once (and also makes it easier to understand the discussion by reading just one of those messages). On 04/24/2015 11:08 AM, mimicafe(a)gmail.com wrote: You can't remove libvirt-daemon-driver-network, as libvirt-daemon-driver-qemu is dependent on it (for very good reasons). If you try to do this, you will almost surely end up with a crashing libvirtd. You are mixing together a couple differnet (but related) things. virbr0 is a bridge device created for libvirt's "default" virtual network, and the dnsmasq instance that is running is also run by libvirt for that network. However, the vnet0 and vnet1 devices are tap devices; one of these is created for each domain interface, whether you use libvirt's network or you connect to a host bridge that you've configured yourself - you can't eliminate those devices. Actually that won't disable any already-installed default network. You'll need to do this: virsh net-destroy default virsh net-undefine default Once you've done this, the virbr0 device will no longer appear, and dnsmasq will not be run (although the binary will still be present on the disk). That's not going to work. There are things in the network driver other than just libvirt's virtual networks, and qemu isn't setup to deal with the network driver not being present.