Linux Shell Scripting Cookbook - Third Edition

How to do it...

The ip command performs several actions using the command/subcommand model. To create a bridge, we use the ip link commands.

The Ethernet adapter being attached to the bridge should not be configured with an IP address when it is added to the bridge. The bridge is configured with an address, not the NIC.

In this example, there are two NIC cards: eth0 is configured and connected to the 192.168.1.0 subnet, while eth1 is not configured but will be connected to the 10.0.0.0 subnet via the bridge:

    # Create a new bridge named br0 
    ip link add br0 type bridge 
 
    # Add an Ethernet adapter to the bridge 
    ip link set dev eth1 master br0 
 
    # Configure the bridge's IP address 
    ifconfig br0 10.0.0.2 
 
    # Enable packet forwarding  
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