Ubuntu 环境下KVM网桥创建

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Ubuntu 环境下 KVM 网桥创建

1、创建网桥的目的是为了让 KVM 虚拟机连接到这个网桥，从而使虚拟机可以和物理网络通信
2、当然，安装完 kvm 后，会自动建立一个网桥 virbr0，这个网桥应该是 nat 模式

一、DHCP 网桥创建
vim /etc/network/interfaces

这是 interfaces 配置文件的内容：

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp 物理网卡也为 DHCP

auto br100
iface br100 inet dhcp 配置 br100 网桥为 DHCP
bridge_ports eth0 配置 br100 建立在物理网卡 eth0 上
bridge_stp off
bridge_fd

创建完成后，重启网络

静态网桥
vim /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.89.3
gateway 192.168.89.2
netmask 255.255.255.0
network 192.168.89.0
broadcast 192.168.89.255

auto br100
iface br100 inet static
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
address 192.168.89.3
network 192.168.89.0
netmask 255.255.255.0
broadcast 192.168.89.255
gateway 192.168.89.2