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Red Hat Enterprise Linux Server Cookbook by William Leemans

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Creating a bridge

A network bridge is a logical device that forwards traffic between connected physical interfaces based on MAC addresses. This kind of bridge can be used to emulate a hardware bridge in virtualization applications, such as KVM, to share the NIC with multiple virtual NICs.

Getting ready

To bridge two physical networks, we need two network interfaces. Your physical interfaces should never be configured with any address as the bridge will be configured with the IP address(es).

How to do it…

For the sake of ease, the physical network interfaces we will bridge are eth1 and eth2. The IPv4 address will be 10.0.0.2 with a subnet mask of 255.0.0.0 and a default gateway of 10.0.0.1.

Creating a bridge using nmcli

Make sure that you activate the ...

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