How configure Bridge for KVM

Readme.md

How configure Bridge for KVM

1. Show the connections with nmcli

sudo nmcli connection show

NAME               UUID                                  TYPE      DEVICE   
Conexão cabeada 1  f54c4eaa-528e-334f-855f-bcfe2417409a  ethernet  enp3s0f1 
CLARO_5G6A694C     075be154-f86f-4c4d-9bb0-225e38021be3  wifi      wlp2s0   
virbr0             cb1bf60e-e48b-4e76-8be7-38f1a4fc1eea  bridge    virbr0  

2. Remove cabled connection

sudo nmcli connection delete f54c4eaa-528e-334f-855f-bcfe2417409a

3. Create the following environment variables accordingly with your infrastructure.

BR_NAME="br10"
BR_INT="enp3s0f1"
SUBNET_IP="192.168.0.129/24"
GW="192.168.0.1"
DNS1="8.8.8.8"
DNS2="8.8.4.4"

4 . Create a new bridge

sudo nmcli connection add type bridge autoconnect yes con-name ${BR_NAME} ifname ${BR_NAME}

5. Configure ip, gateway and dns

sudo nmcli connection modify ${BR_NAME} ipv4.addresses ${SUBNET_IP} ipv4.method manual
sudo nmcli connection modify ${BR_NAME} ipv4.gateway ${GW}
sudo nmcli connection modify ${BR_NAME} ipv4.dns ${DNS1} +ipv4.dns ${DNS2}

6. Remove the automatic bridge that was created

sudo nmcli connection delete ${BR_INT}

7. Create a bridge type slave

sudo nmcli connection add type bridge-slave autoconnect yes con-name ${BR_INT} ifname ${BR_INT} master ${BR_NAME}

8. Show information about created bridge

sudo nmcli connection show

9. Start bridge connection

sudo nmcli connection up br10

10. Show all information about this new bridge

sudo nmcli connection show br10

Source: https://computingforgeeks.com/how-to-create-and-configure-bridge-networking-for-kvm-in-linux/ Thanks