在 CentOS 7.x 中可以用 nmcli（Network Manager Command Line Interface：网络管理命令行接口）进行网卡绑定。
多网卡的7种bond模式原理请参考：http://support.huawei.com/huaweiconnect/enterprise/thread-282727.html
官方文档：https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Network_Bonding_Using_the_NetworkManager_Command_Line_Tool_nmcli.html
nmcli需要NetworkManager服务，先启动：
~]# systemctl start NetworkManager
设备开机启动：
~]# systemctl enable NetworkManager
~]$ systemctl status NetworkManager NetworkManager.service - Network Manager Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled) Active: active (running) since Fri, 08 Mar 2013 12:50:04 +0100; 3 days ago
增加设备：
[root@localhost ~]# nmcli con add type bond con-name bond0 ifname bond0 mode balance-rr
Connection 'bond0' (cfabe2d0-21e9-47e9-9286-c182659b8331) successfully added.
查看结果：
[root@localhost ~]# nmcli con show
NAME UUID TYPE DEVICE
em3 6bcabcdd-656c-4db5-b5fe-6a62716e68f7 802-3-ethernet --
em2 e07ae4a6-19fd-4782-9dd9-87090ae00903 802-3-ethernet --
em4 e6cf4c05-f29a-4d3b-a550-b04878747362 802-3-ethernet --
bond0 cfabe2d0-21e9-47e9-9286-c182659b8331 bond bond0
em1 54bd8900-2e3b-4c69-a1cd-91366e88e0d3 802-3-ethernet em1
[root@localhost ~]#
增加网卡：
[root@localhost ~]# nmcli con add type bond-slave ifname em3 master bond0
Connection 'bond-slave-em3' (92cb4f6e-74ee-48a9-8e56-9f83716e11cc) successfully added.
[root@localhost ~]# nmcli con add type bond-slave ifname em4 master bond0
Connection 'bond-slave-em4' (3c1da71d-6608-41ff-82d4-2e2fd7582136) successfully added.
查看结果
[root@localhost ~]# nmcli con show
NAME UUID TYPE DEVICE
em3 6bcabcdd-656c-4db5-b5fe-6a62716e68f7 802-3-ethernet --
em2 e07ae4a6-19fd-4782-9dd9-87090ae00903 802-3-ethernet --
em4 e6cf4c05-f29a-4d3b-a550-b04878747362 802-3-ethernet --
bond-slave-em4 3c1da71d-6608-41ff-82d4-2e2fd7582136 802-3-ethernet em4
bond-slave-em3 92cb4f6e-74ee-48a9-8e56-9f83716e11cc 802-3-ethernet em3
bond0 cfabe2d0-21e9-47e9-9286-c182659b8331 bond bond0
em1 54bd8900-2e3b-4c69-a1cd-91366e88e0d3 802-3-ethernet em1
[root@localhost ~]#
激活网卡：
[root@localhost ~]# nmcli con up bond-slave-em3
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/10)
[root@localhost ~]# nmcli con up bond-slave-em4
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/11)
配置IP地址等信息：
[root@localhost ~]# nmcli con mod bond0 ipv4.addresses "192.168.100.2/24"
[root@localhost ~]# nmcli con mod bond0 ipv4.method manual
启动网卡：
[root@localhost ~]# nmcli con down bond0
Connection 'bond0' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/32)
[root@localhost ~]# nmcli con up bond0
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/33)
查看结果：
[root@localhost ~]# ifconfig
bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 1500
inet 192.168.100.2 netmask 255.255.255.0 broadcast 192.168.100.255
ether 36:38:d7:a2:89:52 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
em1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.21.21.51 netmask 255.255.255.0 broadcast 172.21.21.255
inet6 fe80::92b1:1cff:fe47:2d15 prefixlen 64 scopeid 0x20<link>
ether 90:b1:1c:47:2d:15 txqueuelen 1000 (Ethernet)
RX packets 17026 bytes 1250498 (1.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1091 bytes 152043 (148.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 41
em2: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 90:b1:1c:47:2d:16 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 46
em3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 90:b1:1c:47:2d:17 txqueuelen 1000 (Ethernet)
RX packets 9 bytes 2551 (2.4 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 47
em4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 90:b1:1c:47:2d:18 txqueuelen 1000 (Ethernet)
RX packets 4 bytes 492 (492.0 B)
RX errors 0 dropped 48 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 48
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 1 bytes 99 (99.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1 bytes 99 (99.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
TYPE=Bond
BONDING_MASTER=yes
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME=bond0
UUID=cfabe2d0-21e9-47e9-9286-c182659b8331
ONBOOT=yes
BONDING_OPTS=mode=balance-rr
IPADDR=192.168.100.2
PREFIX=24
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
帮助：
[root@localhost ~]# nmcli con add help
Usage: nmcli connection add { ARGUMENTS | help }
ARGUMENTS := COMMON_OPTIONS TYPE_SPECIFIC_OPTIONS IP_OPTIONS
COMMON_OPTIONS:
type <type>
ifname <interface name> | "*"
[con-name <connection name>]
[autoconnect yes|no]
[save yes|no]
TYPE_SPECIFIC_OPTIONS:
ethernet: [mac <MAC address>]
[cloned-mac <cloned MAC address>]
[mtu <MTU>]
wifi: ssid <SSID>
[mac <MAC address>]
[cloned-mac <cloned MAC address>]
[mtu <MTU>]
[mode infrastructure|ap|adhoc]
wimax: [mac <MAC address>]
[nsp <NSP>]
pppoe: username <PPPoE username>
[password <PPPoE password>]
[service <PPPoE service name>]
[mtu <MTU>]
[mac <MAC address>]
gsm: apn <APN>
[user <username>]
[password <password>]
cdma: [user <username>]
[password <password>]
infiniband: [mac <MAC address>]
[mtu <MTU>]
[transport-mode datagram | connected]
[parent <ifname>]
[p-key <IPoIB P_Key>]
bluetooth: [addr <bluetooth address>]
[bt-type panu|dun-gsm|dun-cdma]
vlan: dev <parent device (connection UUID, ifname, or MAC)>
id <VLAN ID>
[flags <VLAN flags>]
[ingress <ingress priority mapping>]
[egress <egress priority mapping>]
[mtu <MTU>]
bond: [mode balance-rr (0) | active-backup (1) | balance-xor (2) | broadcast (3) |
802.3ad (4) | balance-tlb (5) | balance-alb (6)]
[primary <ifname>]
[miimon <num>]
[downdelay <num>]
[updelay <num>]
[arp-interval <num>]
[arp-ip-target <num>]
[lacp-rate slow (0) | fast (1)]
bond-slave: master <master (ifname, or connection UUID or name)>
team: [config <file>|<raw JSON data>]
team-slave: master <master (ifname, or connection UUID or name)>
[config <file>|<raw JSON data>]
bridge: [stp yes|no]
[priority <num>]
[forward-delay <2-30>]
[hello-time <1-10>]
[max-age <6-40>]
[ageing-time <0-1000000>]
[mac <MAC address>]
bridge-slave: master <master (ifname, or connection UUID or name)>
[priority <0-63>]
[path-cost <1-65535>]
[hairpin yes|no]
vpn: vpn-type vpnc|openvpn|pptp|openconnect|openswan|libreswan|ssh|l2tp|iodine|...
[user <username>]
olpc-mesh: ssid <SSID>
[channel <1-13>]
[dhcp-anycast <MAC address>]
adsl: username <username>
protocol pppoa|pppoe|ipoatm
[password <password>]
[encapsulation vcmux|llc]
IP_OPTIONS:
[ip4 <IPv4 address>] [gw4 <IPv4 gateway>]
[ip6 <IPv6 address>] [gw6 <IPv6 gateway>]