linux系統做雙網卡綁定，經過實驗得出以下步驟
系統版本：CentOSrelease 6.8 (Final)
系統內核版本：2.6.32-642.el6.x86_64
1.1網卡配置如下
cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=dhcp
cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=dhcp
cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.137.10
NETMASK=255.255.255.0
DNS1=202.96.128.166
1.2配置/etc/modprobe.d/dist.conf文件，加上以下配置
alias bond0 bonding
options bond0 miimon=100 mode=1 #若想使用負載均衡模式，修改mode=0，其他配置不動即可
說明：
miimon是毫秒數，每100毫秒觸發檢測線路穩定性的事件
mode 是ifenslave的工作狀態
miimon=100表示系統每100ms監控一次鏈路連接狀態，如果有一條線路不通就轉入另一條線（此監控是監控服務器到交換機之間的線路，交換機以上的線路斷開了，此監控線路也顯示沒有故障問題）
mode=1表示active-backup，提供冗餘功能，工作方式是主備，默認情況下只有一塊網卡工作，另一塊做備份網卡
mode=0表示round-robin，負載均衡，此狀態並沒有增加帶寬，只是在兩塊網卡輪詢工作，兩塊網卡的帶寬速率是平均的，同時也支持容錯能力（此狀態需要交換機做聚合端口）
1.3配置/etc/rc.local，加上以下配置
ifenslave bond0 eth0 eth1 #啓動將eth0、eth1綁定成bond0
route add default gw 192.168.137.1 bond0 #啓動添加默認網關
1.4查看網卡信息
ifconfig
bond0 Linkencap:Ethernet HWaddr 00:0C:29:A6:77:FA
inetaddr:192.168.137.10 Bcast:192.168.137.255 Mask:255.255.255.0
inet6 addr:fe80::20c:29ff:fea6:77fa/64 Scope:Link
UP BROADCAST RUNNINGMASTER MULTICAST MTU:1500 Metric:1
RX packets:1737errors:0 dropped:0 overruns:0 frame:0
TX packets:930errors:0 dropped:0 overruns:0 carrier:0
collisions:0txqueuelen:0
RX bytes:138239(134.9 KiB) TX bytes:105449 (102.9 KiB)
eth0 Linkencap:Ethernet HWaddr 00:0C:29:A6:77:FA
inet6 addr:fe80::20c:29ff:fea6:77fa/64 Scope:Link
UP BROADCAST RUNNINGSLAVE MULTICAST MTU:1500 Metric:1
RX packets:1521errors:0 dropped:0 overruns:0 frame:0
TX packets:746errors:0 dropped:0 overruns:0 carrier:0
collisions:0txqueuelen:1000
RX bytes:124324(121.4 KiB) TX bytes:94507 (92.2 KiB)
eth1 Link encap:Ethernet HWaddr 00:0C:29:A6:77:FA
UP BROADCAST RUNNINGSLAVE MULTICAST MTU:1500 Metric:1
RX packets:221errors:0 dropped:0 overruns:0 frame:0
TX packets:199errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RXbytes:15061 (14.7 KiB) TX bytes:12592(12.2 KiB)
說明：
bond0、eth0、eth1的MAC地址都是一樣的
1.5查看bond0信息
cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup) #主備模式
Primary Slave: None
Currently Active Slave: eth0
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth0
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:a6:77:fa
Slave queue ID: 0
Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:a6:77:04
Slave queue ID: 0
說明：
實際eth0和eth1的MAC地址是不一樣的
1.6測試效果
ping192.168.137.10 –t
物理斷開eth0：
查看bond0信息：eth0斷開，系統使用eth1網卡
cat /proc/net/bonding/bond0
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: eth0
MII Status: down
Speed: Unknown
Duplex: Unknown
Link Failure Count: 1
Permanent HW addr: 00:0c:29:a6:77:fa
Slave queue ID: 0
Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:a6:77:04
Slave queue ID: 0