操作系统：RHEL7.0
两个网卡连接在一个交换机下面，本例用vmware模拟都在NAT模式下

1、查看当前网卡名字 mac地址，确定当前为ens33、ens37

[root@LiuZhen network-scripts]#
[root@LiuZhen network-scripts]# ifconfig
ens33: flags=4163 mtu 1500
        inet 192.168.221.222 netmask 255.255.255.0 broadcast 192.168.221.255
        inet6 fe80::20c:29ff:fe92:cdde prefixlen 64 scopeid 0x20
        ether 00:0c:29:92:cd:de txqueuelen 1000 (Ethernet)
        RX packets 476 bytes 44782 (43.7 KiB)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 410 bytes 61722 (60.2 KiB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ens37: flags=4163 mtu 1500
        ether 00:0c:29:92:cd:e8 txqueuelen 1000 (Ethernet)
        RX packets 39 bytes 2523 (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

2、进入以下目录/etc/sysconfig/network-scripts

vi ifcfg-ens33

TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
DEVICE=ens33
MASTER=bond0
SLAVE=yes

vi ifcfg-ens37

TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
DEVICE=ens37
MASTER=bond0
SLAVE=yes

vi ifcfg-bond0

TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
DEVICE=bond0
IPADDR=192.168.221.222
PREFIX=16
DNS=192.168.221.2
NM_CONTROLLED=no

vi /etc/modprobe.d/bond.conf

alias bond0 bonding
options bond0 miimon=100 mode=6

mode=6：平衡负载模式，两个都工作。有自动备援，不需要 “Switch”支援及设定。

mode=1：自动备援模式，只有一个工作。其中一条线若断线，其他线路将会自动备援。

mode=0：平衡负载模式，两个都工作。有自动备援，但需要 “Switch”支援及设定（这两个端口应该采取聚合方式）。

3、重启网络服务，
service network restart

[root@LiuZhen network-scripts]# ifconfig -a
bond0: flags=5187 mtu 1500
        inet 192.168.221.222 netmask 255.255.0.0 broadcast 192.168.255.255
        inet6 fe80::20c:29ff:fe92:cdde prefixlen 64 scopeid 0x20
        ether 00:0c:29:92:cd:de txqueuelen 0 (Ethernet)
        RX packets 1007 bytes 90348 (88.2 KiB)
        RX errors 0 dropped 8 overruns 0 frame 0
        TX packets 817 bytes 133925 (130.7 KiB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ens33: flags=6211 mtu 1500
        ether 00:0c:29:92:cd:de txqueuelen 1000 (Ethernet)
        RX packets 901 bytes 83115 (81.1 KiB)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 751 bytes 126638 (123.6 KiB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ens37: flags=6211 mtu 1500
        ether 00:0c:29:92:cd:e8 txqueuelen 1000 (Ethernet)
        RX packets 106 bytes 7233 (7.0 KiB)
        RX errors 0 dropped 8 overruns 0 frame 0
        TX packets 66 bytes 7287 (7.1 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

查看配置文件

root@LiuZhen network-scripts]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: adaptive load balancing
Primary Slave: None
Currently Active Slave: ens33
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: ens33
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:92:cd:de
Slave queue ID: 0

Slave Interface: ens37
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:92:cd:e8

Slave queue ID: 0

配置完成。

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