Brctl config file

A network bridge works with a combination of the physical address layer MAC address and the data link layer. For networking on Ubuntu Linux , the dynamic type of network bridge connections are most popular and the notion is very simple to install.

When multiple network devices are connected through network topology, it is important to make the connections secure, fast, and private. The functioning method of the network bridge is clear to understand. It works with the MAC media access control address and the data link layer recognition method. The network bridge works with the segment method where devices are divided into a couple of segments with ports and unique MAC addresses.

The network bridge uses the DDL2 data link layer to function where the bridges are used as the junction of the MAC address. Each segment cross-checks the segment, the MAC address, and, the data link layer; then it delivers the data packet to the specific network device. To get the network bridge installed and activated on your Ubuntu Linux, very first, you need to install the bridge utility software inside your Linux machine. As here, we are dealing with Ubuntu so we will be using the apt-get command to install the network bridge inside the machine.

Then, we will check the internet protocol IP address and the ethernet connection port settings or configurations of our system by using the basic net-tool commands of Ubuntu.

Netplan is the very primary configuration files that are stored inside the root of the Ubuntu Linux filesystem. We can open and edit the netplan configuration file through the Nano script editor.

Now, we have to add the basic bridge connection setting and configuration inside the script file. We will get the ethernet ID from the ifconfig command.

Here, I am using my ethernet address, be mindful to replace it with your ethernet ID. Feel free to get that script lines. The Network Manager Command-Line, or in short the nmcli is the command-line based interface to setup and configure the network settings on the Ubuntu Linux.

Very first we will add the connection type and save the bridge network connection to the network manager through the nmcli command on Ubuntu.

Bridges can filter traffic between different segments, thereby reducing the amount of traffic on LAN, even with many LAN segments. This bridge functionality is built into the Linux kernel, so one can set up a software bridge interconnecting multiple network interfaces.

In a server environment, a Linux bridge can be created with a user-space command-line tool called brctl. This tool allows you to create, remove and administer Linux Ethernet bridges. Create New Ethernet Bridge using addbr Using brctl addbr, we can create a new ethernet bridge.

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