ETH接口是什么？

eth 代表ethernet 以太网的意思

Here's what Ethernet means.

eth0，eth1，eth2……代表网卡一，网卡二，网卡三……

Eth0, Eth1, Eth2... represent net card one, net card two, net card three...

ifconfig配置网卡

ifconfig configuration webcard

配置网卡的IP地址

Configure IP addresses for web cards

ifconfig eth0 192.168.0.1 netmask 255.255.255.0

在eth0上配置上192.168.0.1 的IP地址及24位掩码。若想再在eth0上在配置一个192.168.1.1/24 的IP地址怎么办？用下面的命令

Configure the IP address of 192.168.0.1 on eth0 and the 24-bit mask. What if you want to install an IP address of 192.168.1.1.24 on eth0? Use the following command.

ifconfig eth0：0 192.168.1.1 netmask 255.255.255.0

这时再用ifconifg命令查看，就可以看到两个网卡的信息了，分别为：eth0和eth0：0.若还想再增加IP，那网卡的命名就接着是：eth0：1、eth0：2……想要几个就填几个。ok！

If you use an ifconifg command then you can see information on two webcards: eth0 and eth0:0. If you want to add another IP, then the name of the net card goes after: eth0:1, eth0:2... fill out a few if you want them.

配置网卡的硬件地址

Configure hardware addresses for web cards

ifconfig eth0 hw ether xx：xx：xx：xx：xx：xx就将网卡的硬件地址更改了，此时你就可以骗过局域网内的IP地址邦定了。

If config eth0 hw other xx:xx:xx:xx:xx:xx:xx changes the hardware address of the netcard, then you can fool the IP address in the local area network.

将网卡禁用

Disable Netcard

ifconfig eth0 down

将网卡启用

Enable the netcard

ifconfig eth0 up

ifconfig 命令的功能很强大，还可以设置网卡的MTU，混杂模式等。

Ifconfig commands have a powerful function, they can also set MTU on the net card, mix mode, etc.

ETH-Trunk接口是一种可以动态创建的接口，该类型接口可以绑定若干物理的以太网接口作为一个逻辑接口使用。

The ETH-Trunk interface is a dynamicly created interface that can be used as a logical interface by binding several physical Ethernet interfaces.

ETH接口的作用：

The role of the ETH interface:

1. 加入到Eth-Trunk接口的以太网接口称为成员接口，只需对Eth-Trunk接口进行配置，最终会映射到成员接口上。

   The Eth-Trunk interface that is added to the Eth-Trunk interface is called a member interface, and only the Eth-Trunk interface is configured and eventually mapd on the member interface.

2. Eth-Trunk接口有路由模式和交换模式两种。

   The Eth-Trunk interface has two modes of route and exchange.

3. 路由模式的Eth-Trunk接口与路由模式的以太网接口类似，可以配置IP地址，运行各种路由协议、MPLS VPN等多种业务；

   The route-based Eth-Trunk interface is similar to the route-based Ethernet interface and can be configured with IP addresses to run a variety of operations such as route agreements, MPLS VPN;

4. 交换模式的Eth-Trunk接口与交换模式以太网接口类似，可以加入VLAN，运行STP等协议。

   The Eth-Trunk interface of the exchange mode is similar to that of the exchange mode, which allows for the addition of VLAN to such protocols as STP.

5. Eth-Trunk接口应用特点有拓展接口带宽，增加链路可靠性以及流量的负载分担。

   The Eth-Trunk interface application features the extension of the bandwidth of the interface, increased chain reliability and burden-sharing of traffic.