[root@localhost ~]# cat /etc/issue
CentOS release 6.5 (Final)
Kernel \r on an \m
[root@localhost ~]# echo "alias netdev-bond0 bonding" >/etc/modprobe.d/bonding.conf
网卡绑定前需要执行这个命令，以此来添加服务器启动时加载的模块。
修改新建网卡绑定bond0配置文件
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
USERCTL=no
PEERDNS=yes
IPV6INIT=no
IPADDR=112.25.xx.xx
NETMASK=255.255.255.192
BROADCAST=112.25.xx.xx
GATEWAY=112.25.xx.xx
BONDING_OPTS="miimon=80 mode=6"
miimon 是链路监测的时间间隔单位是毫秒，miimon=80的意思就是每80ms监测一次链路连接状态，如果有一条线路不通就转入另一条线路。
mode=0 表示负载均衡方式，两块网卡都工作，需要作支持
mode=1 表示冗余方式，网卡只有一个工作，一个出问题启用另外的
mode=6 表示负载均衡方式，两块网卡都工作，不需要交换机作支持
我这里做的是四个网卡的绑定，服务器是dell R720，其网卡默认名称为em1--em4，网卡绑定时候，四个网卡的配置基本相似，master需要制定为bond0，四个网卡均为slave
DEVICE=em1
ONBOOT=yes
TYPE=Ethernet
HWADDR=00:0c:29:9c:95:a8 -----一定要加
BOOTPROTO=static
USERCTL=no
MASTER=bond0
SLAVE=yes
开机启动脚本
- ifenslave bond0 eth0 eth1
service networkmanager stop 必须关闭，否则重启网络后，无法通信，并且不报错。
chkconfig NetworkManager off
重启服务器
然后查看网卡绑定信息
cat /proc/net/bonding/bond0
[root@localhost ~]# ifconfig
bond0 Link encap:Ethernet HWaddr F8:BC:12:38:BF:04
inet addr:112.25.xx.17 Bcast:112.25.xx.63 Mask:255.255.255.192
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:198948 errors:0 dropped:0 overruns:0 frame:0
TX packets:374418 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:20792024 (19.8 MiB) TX bytes:29577760 (28.2 MiB)
em1 Link encap:Ethernet HWaddr F8:BC:12:38:BF:04
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:36838 errors:0 dropped:0 overruns:0 frame:0
TX packets:123885 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3250190 (3.0 MiB) TX bytes:12842300 (12.2 MiB)
Interrupt:35
em2 Link encap:Ethernet HWaddr F8:BC:12:38:BF:05
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:88178 errors:0 dropped:0 overruns:0 frame:0
TX packets:87303 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11017650 (10.5 MiB) TX bytes:6243968 (5.9 MiB)
Interrupt:38
em3 Link encap:Ethernet HWaddr F8:BC:12:38:BF:06
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:37044 errors:0 dropped:0 overruns:0 frame:0
TX packets:81803 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3274966 (3.1 MiB) TX bytes:5272322 (5.0 MiB)
Interrupt:34
em4 Link encap:Ethernet HWaddr F8:BC:12:38:BF:07
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:36888 errors:0 dropped:0 overruns:0 frame:0
TX packets:81427 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3249218 (3.0 MiB) TX bytes:5219170 (4.9 MiB)
Interrupt:36
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:99 (99.0 b) TX bytes:99 (99.0 b)