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davesilva/kvm-bridge-networking-on-debian-buster.md

Last active March 8, 2023 14:41
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Bridge networking for KVM on Debian Buster
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kvm-bridge-networking-on-debian-buster.md

Step 1: Create bridge network

Edit /etc/network/interfaces

# Set up physical ethernet interface (enp4s0) to not use DHCP
iface enp4s0 inet manual
iface enp4s0 inet6 manual

# Set up bridge interface to use DHCP instead
auto br0
iface br0 inet dhcp
    bridge_ports enp4s0
    bridge_stp off
    bridge_maxwait 0
    bridge_fd 0
iface br0 inet6 auto
    accept_ra 1

Run sudo systemctl restart networking

When running ip addr the br0 interface should have an ip address while enp4s0 should not.

Step 2: Configure KVM virtual machine to use br0

In virt-manager, edit the network interface for the VM and select "Bridge br0" as the network source.

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