双网卡绑定在项目应用中较多，通常配置上网卡绑定有两种方法，第一种是采用传统方法修改配置文件，第二种是采用新的命令直接生成配置文件。
传统配置方法步骤如下：
第一步：编辑网卡eth1配置文件
第二步：复制网卡eth1配置文件，重命名为eth2
第三步：复制网卡eth1配置文件，重命名为bond0，并设置双网卡绑定的相关选项如：双网卡之间检测周期100ms，双网卡之间的模式模式1 为主被模式，模式0为双主模式，如BONDING_OPTS="miimon=100 mode=0"
第四步：重启网络服务
如下实例 ：
[root@CentOS7 /etc/sysconfig/network-scripts]#vim ifcfg-eth1
1 DEVICE=eth1 #编辑配置文件eth1
2 BOOTPROTO=none
3 MASTER=bond0
4 SLAVE=yes
5 USERCTL=no #是否允许普通用户管理此端口
[root@centos7 /etc/sysconfig/network-scripts]#cp ifcfg-eth1 ifcfg-eth2
cp: overwrite ‘ifcfg-eth2’? y #复制配置文件
[root@centos7 /etc/sysconfig/network-scripts]#vim ifcfg-eth2
1 DEVICE=eth2 #修改DEVICE=eth2
2 BOOTPROTO=none
3 MASTER=bond0
4 SLAVE=yes
5 USERCTL=no
[root@centos7 /etc/sysconfig/network-scripts]#cp ifcfg-eth1 ifcfg-bond0
[root@centos7 /etc/sysconfig/network-scripts]#vim ifcfg-bond0
1 DEVICE=bond0
2 BOOTPROTO=none
3 BONDING_OPTS="miimon=100 mode=0"
4 IPADDR=192.168.10.100
5 PREFIX=24
6 GATEWAY=192.168.10.254
7 DNS1=114.114.114.114
8 DNS2=8.8.8.8
[root@centos7 ~]#systemctl restart network #重启网络服务
[root@centos7 ~]#cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:cf:ed:5f
Slave queue ID: 0
Slave Interface: eth2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:cf:ed:69
Slave queue ID: 0
脚本中通常采用nmcli命令实现上网卡绑定，如若通过配置文件进行双网卡绑定较为复杂，具体命令步骤如下（在nmcli命令中con-name代表生成配置文件的名的名称，ifname是DEVICE的名称）：
第一步：创建bond0
nmcli con add type bondcon-name bond0 ifname bond0 mode 1 miimon 100
第二步：加载slave成员
nmcli con add typebond-slave ifname eth1 master bond0
nmcli con add typebond-slave ifname eth1 master bond0
第三步：启动bond-slave-eth1和2成员，以及bond0成员
nmcliconnection up "bond-slave-eth1"
nmcliconnection up "bond-slave-eth1"
nmcliconnection up "bond0"
如若删除bond0
第四步：让bond0先down
nmcli connectiondown bond0
第五步：删除配置文件
nmcli connection deletebond0
nmcli connectiondelete bond-slave-eth1
nmcli connectiondelete bond-slave-eth2
具体实例演示：
[root@centos7 ~]#nmcli con add type bond con-name bond0 ifname bond0 mode 1 miimon 100
[root@centos7 ~]#nmcli con add type bond-slave ifname eth1 master bond0
[root@centos7 ~]#nmcli con add type bond-slave ifname eth2 master bond0
[root@centos7 ~]#nmcli connection show #发现bond-slave-eth1和2并无启动
NAME UUID TYPE DEVICE
bond-slave-eth1 aa3662d9-0382-4640-ab56-fb40d8da41de 802-3-ethernet --
bond0 882245a8-c2f8-4fbd-9fbe-69769367bc43 bond bond0
eth2 9b2cd717-a336-4739-9a0c-c93ba560daee 802-3-ethernet eth2
eth1 32ccd8a8-a6fb-4516-94da-48d394c338d8 802-3-ethernet eth1
eth0 90e23a1d-6f6e-461d-b2a3-15eab49cf43b 802-3-ethernet eth0
vlan-VLAN10 4dc6d0e3-154c-0cff-3dd4-adef4ad932f1 vlan --
bond-slave-eth2 c06c8a6e-7ea9-410b-a5f0-dd2337bbd0ba 802-3-ethernet --
[root@centos7 ~]#nmcli connection up "bond-slave-eth1" #启动bond-slave-eth1
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/29)
[root@centos7 ~]#nmcli connection up "bond-slave-eth2" #启动bond-slave-eth2
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/30)
[root@centos7 ~]#nmcli connection show #查看验证发现所有端口正常
NAME UUID TYPE DEVICE
bond-slave-eth1 aa3662d9-0382-4640-ab56-fb40d8da41de 802-3-ethernet eth1
bond0 882245a8-c2f8-4fbd-9fbe-69769367bc43 bond bond0
eth2 9b2cd717-a336-4739-9a0c-c93ba560daee 802-3-ethernet --
eth1 32ccd8a8-a6fb-4516-94da-48d394c338d8 802-3-ethernet --
eth0 90e23a1d-6f6e-461d-b2a3-15eab49cf43b 802-3-ethernet eth0
vlan-VLAN10 4dc6d0e3-154c-0cff-3dd4-adef4ad932f1 vlan --
bond-slave-eth2 c06c8a6e-7ea9-410b-a5f0-dd2337bbd0ba 802-3-ethernet eth2
[root@centos7 ~]# ip a
13: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP #无需重启网络服务，已经自动获取IP地址
link/ether 00:0c:29:cf:ed:5f brd ff:ff:ff:ff:ff:ff
inet 172.18.250.48/16 brd 172.18.255.255 scope global dynamic bond0
valid_lft 85630sec preferred_lft 85630sec
inet6 fe80::20c:29ff:fecf:ed5f/64 scope link
valid_lft forever preferred_lft forever
[root@centos7 ~]#cat /proc/net/bonding/bond0 #查看内存运行状态
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth1
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:cf:ed:5f
Slave queue ID: 0
Slave Interface: eth2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:cf:ed:69
Slave queue ID: 0
如若想参考纯正版的资料可到官网：
https://access.RedHat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Configure_802_1Q_VLAN_Tagging_Using_the_Command_Line.html
或Linux系统本身的man文档：
cat /usr/share/doc/kernel-doc-version/Documentation/networking/bonding.txt
https://www.kernel.org/doc/Documentation/networking/bonding.txt