Once the system is back online after reboot, we will see that bridge br0 will come up, run the following command to confirm, :~$ ip a s br0 To make the above network changes into the effect we have to reboot the system, so run the below reboot command, :~$ sudo reboot
#Configure bridge and give it a static ip Replace the interface name, bridge name and IP details as per your setup. ( Also make sure to remove IP address from ens33). In my case ens33 is the physical nic and br0 is the Linux bridge and have assigned same ip address of ens33 to bridge br0.
To create a bridge in Debian 10, edit the network configuration file “ /etc/network/interfaces” and add the following contents, When we install KVM then it automatically creates a bridge with name “ virbr0“, this is generally used for all test environments but if you wish to access your KVM VMs over the network then create Linux bridge which will be attached to physical nic ( or lan card) of your system. :~$ newgrp libvirt-qemu Step:4) Create Linux Bridge(br0) for KVM VMs To refresh or reload group membership run the followings, :~$ newgrp libvirt Note: If you want a normal user to use virsh commands then add that user to libvirt and libvirt-qemu group using the following commands :~$ sudo adduser pkumar libvirt :~$ echo "vhost_net" | sudo tee -a /etc/modules If you want to offload the mechanism of “ virtio-net” and want to improve the performance of KVM VMs then add “ vhost_net” kernel module on your system using the beneath command, :~$ sudo modprobe vhost_net Run the below virsh command to list available networks for kvm VMs :~$ sudo virsh net-list -allĪs we can see in above output, default network is inactive so to make it active and auto-restart across the reboot by running the following commands, :~$ sudo virsh net-start default Step:3) Start default network and add vhost_net module
Once above packages are installed successfully then libvirtd service will be started automatically, run the below systemctl command to verify the status :~$ sudo systemctl status rvice Kvm, qemu, libvirt and virt-manager packages are available in the default repositories of Debian 10, run the beneath apt command to install these packages, :~$ sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virtinst libvirt-daemon virt-manager -y Step:2) Install QEMU-KVM & Libvirt packages along with virt-manager If the output contains vmx then you have a Intel based processor and svm confirms that it is AMD processor. Run the below command to verify whether your processor is Intel / AMD and support hardware virtualization, :~$ grep -E -color '(vmx|svm)' /proc/cpuinfo If the output is zero then we must restart the system, go to bios settings and then enable VT-x (Virtualization Technology Extension) for Intel processor and AMD-V for AMD processor. If output of above command is more than zero then we can say Virtualization technology enabled on your system.
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