本文针对是Proxmox VE底层系统/etc/network/interface 配置

Default Configuration (bridged) 默认配置（桥接）
The installation program creates a single bridge (vmbr0), which is connected to the first ethernet card (eth0).
安装程序创建一个单一桥（vmbr0），它是连接到第一个以太网卡（eth0的）。

auto lo
iface lo inet loopback

auto vmbr0
iface vmbr0 inet static
        address 192.168.10.2
        netmask 255.255.255.0
        gateway 192.168.10.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

Virtual machine behaves like directly connected to the physical network.
虚拟机行为就像直接连接到物理网络。

Routed Configuration
路由配置
Most hosting providers does not support above setup. For security reason they stop networking as soon as they detect multiple MAC addresses.
大多数托管服务提供商不支持以上设置。 出于安全原因，他们停止联网，尽快为他们检测多个MAC地址。

A common setup is that you get a public IP (assume 192.168.10.2 for this example), and additional IP blocks for your VMs (10.10.10.1/255.255.255.0). For such situation we recommend the following setup.
一个常见的设置是，您会获得一个公网IP（假设这个例子192.168.10.2），和其它的IP为虚拟机（10.10.10.1/255.255.255.0）。对于这样的情况下，我们推荐以下设置。

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address  192.168.10.2
        netmask  255.255.255.0
        gateway  192.168.10.1
        post-up echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp


auto vmbr0
iface vmbr0 inet static
        address  10.10.10.1
        netmask  255.255.255.0
        bridge_ports none
        bridge_stp off
        bridge_fd 0
Masquerading
Sometimes you want to use private IPs and masquerade the traffic:
有时你想使用私人IP和非真实地址：

auto vmbr1
iface vmbr1 inet static
        address  192.168.0.234
        netmask  255.255.255.0
        bridge_ports none
        bridge_stp off
        bridge_fd 0
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up iptables -t nat -A POSTROUTING -s '192.168.0.0/24' -o eth1 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s '192.168.0.0/24' -o eth1 -j MASQUERADE

Unsupported Routing
不支持路由

Physical NIC (eg., eth1) cannot currently be made available exclusively for a particular KVM / Container , ie., without bridge and/or bond.
物理网卡（例如，eth1使用），目前不能提供专门针对特定的KVM /封装，即，无桥和/或直连。 

本文配置来源于
http://pve.proxmox.com/wiki/Network_Model