Shulou(Shulou.com)06/01 Report--

Today, I would like to share with you how to use nmcli to create / add bridges in Linux. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

How to use nmcli to create / add a bridge the steps to add a bridge interface on Linux using NetworkManager are as follows:

Open the terminal

Get the current connection status: nmcli con show

Add a new bridge: nmcli con add type bridge ifname br0

Create a subnet card: nmcli con add type bridge-slave ifname eno1 master br0

Open br0: nmcli con up br0

Let's look at how to create a bridge called br0 at the level of detail.

To get the current network configuration, you can learn about the local network connection through NetworkManager's GUI:

Getting Network Info on Linux

You can also view it using the following command line:

$nmcli con show $nmcli connection show-- active

View the connections with nmcli

I have a "wired connection" using the network card eno1. My system also has a VPN interface. I'm going to create a bridge called br0 and connect to eno1.

How to create a bridge named br0 $sudo nmcli con add ifname br0 type bridge con-name br0 $sudo nmcli con add type bridge-slave ifname eno1 master br0 $nmcli connection show

Create bridge interface using nmcli on Linux

You can also disable STP:

The last command of $sudo nmcli con modify br0 bridge.stp no $nmcli con show $nmcli-f bridge con show br0 shows the bridge parameters when STP is disabled:

Bridge.mac-address:-- bridge.stp: no bridge.priority: 32768 bridge.forward-delay: 15 bridge.hello-time: 2 bridge.max-age: 20 bridge.ageing-time: 300 bridge.multicast-snooping: how to open a bridge in yes you must first close Wired connection 1 Then open br0:

$sudo nmcli con down "Wired connection 1" $sudo nmcli con up br0 $nmcli con show uses the ip command to view IP information:

$ip a s $ip a s br0

Build a network bridge with nmcli on Linux

Appendix: how to use br0 on KVM now you can use the VM (virtual machine) created by KVM/VirtualBox/VMware workstation to connect directly to the network instead of through NAT. Use the vi or cat command to create a file called br0.xml for the virtual machine:

$cat / tmp/br0.xml add the following code:

Br0 runs the virsh command as follows:

# virsh net-define / tmp/br0.xml # virsh net-start br0 # virsh net-autostart br0 # virsh net-list-- all output:

Name State Autostart Persistent-br0 active yes yes default inactive no yes read the man page for more information:

The above $man ip $man nmcli is all the content of the article "how to use nmcli to create / add bridges in Linux". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.