RHEL / CentOS KVM Bridged Networking

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CentOS 6 LogoThis tutorial help you to setup KVM bridged networking which allows guest operating system to communicate external network or vice versa. Before going to setup a bridged connection; stop networking service. Here we uses network connection “eth0” to get it bridged with “br0” virtual adapter.

service network stop
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Create a virtual adapter named “br0” with following configuration, change the ip address and other related configuration based on your requirement.

vi /etc/sysconfig/network-scripts/ifcfg-br0

Configuration as follows.

DEVICE=br0
TYPE=Bridge
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.0.151
NETMASK=255.255.255.0
GATEWAY=192.168.0.99
DNS1=192.168.0.162
DNS2=192.168.0.250
DELAY=0

Now edit your adapter configuration, as per my machine; i have only one adapter named “eth0”.

vi /etc/sysconfig/network-scripts/ifcfg-eth0

Add the following information to bridge with virtual adapter  “br0”, Do not place the following MAC address on your file.

DEVICE=eth0
ONBOOT=yes
BRIDGE=br0
HWADDR=D0:27:88:1C:65:DE

Start networking service.

service network start

Confirm the bridged networking with the following command.

brctl show

Result will look like below.

bridge name     bridge id               STP enabled     interfaces
br0             8000.d027881c65de       no              eth0

That’s All.

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