网卡绑定就是多张网卡逻辑上作为一张网卡用。可分为，负载均衡绑定和冗余绑定两种。
1.编辑虚拟网络接口配置文件
[root@test~]# more /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0 IPADDR=172.16.4.100 NETMASK=255.255.255.0 BROADCAST=172.16.4.255 NETWORK=172.168.4.100 ONBOOT=yes2.编辑各网卡的配置文件，注意编辑之前做好备份工作
[root@test~]# more /etc/sysconfig/network-scripts/ifcfg-eth0
BOOTPROTO=none TYPE=Ethernet DEVICE=eth0 ONBOOT=yes MASTER=bond0 slave=yes [root@test ~]# more /etc/sysconfig/network-scripts/ifcfg-eth1 BOOTPROTO=none TYPE=Ethernet DEVICE=eth1 ONBOOT=yes MASTER=bond0 slave=yes
3.改动/etc/modprobe.conf 文件，相同做好备份，最后增加2行 alias bond0 bonding options bond0 miimon=100 mode=1 注： （1）、miimon 是链路监測的时间间隔单位是毫秒，miimon=100的意思就是，每100毫秒检測网卡和交换机之间是否连通，如不通则使用另外的链路。 （2)、mode=0 表示负载均衡方式，两块网卡都工作，须要交换机作支持 mode=1 表示冗余方式，网卡仅仅有一个工作，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，不须要交换机作支持
[root@test~]# more /etc/modprobe.conf
alias eth0 b44 alias eth1 8139too alias usb-controller ehci-hcd alias usb-controller1 ohci-hcd alias bond0 bonding options bond0 miimon=100 mode=04.在/etc/rc.d/rc.local 增加例如以下一行 ifenslave bond0 eth0 eth1
[root@test~]# more /etc/rc.d/rc.local
#!/bin/sh # # This script will be executed *after* all the other init scripts. # You can put your own initialization stuff in here if you don't # want to do the full Sys V style init stuff. touch /var/lock/subsys/local ifenslave bond0 eth0 eth15.又一次启动后负载平衡已经能正常工作，service network restart，
6.查看bond0的工作状态
[root@test~]# more /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v2.6.1 (October 29, 2004) Bonding Mode: load balancing (round-robin) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eth0 MII Status: up Link Failure Count: 1 Permanent HW addr: 00:1b:b9:58:8b:b2 Slave Interface: eth1 MII Status: down Link Failure Count: 0 Permanent HW addr: 00:07:40:6c:ac:c87.查看经过绑定后的网卡工作情况
[root@test ~]# ifconfig -a
bond0 Link encap:Ethernet HWaddr00:1B:B9:58:8B:B2inet addr:172.16.4.100 Bcast:172.16.4.255 Mask:255.255.255.0
inet6 addr:fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNINGMASTER MULTICAST MTU:1500 Metric:1 RX packets:744154errors:0 dropped:0 overruns:0 frame:0 TX packets:1866915errors:0 dropped:0 overruns:0 carrier:0 collisions:0txqueuelen:0 RX bytes:1099876146 (1.0GiB) TX bytes:121233595 (115.6 MiB) eth0 Link encap:Ethernet HWaddr00:1B:B9:58:8B:B2 inet6 addr:fe80::21b:b9ff:fe58:8bb2/64 Scope:Link UP BROADCAST RUNNINGSLAVE MULTICAST MTU:1500 Metric:1 RX packets:744154errors:0 dropped:0 overruns:0 frame:0 TX packets:1866905errors:0 dropped:0 overruns:0 carrier:0 collisions:0txqueuelen:1000 RX bytes:1099876146 (1.0GiB) TX bytes:121232839 (115.6 MiB) Interrupt:9 eth1 Link encap:Ethernet HWaddr00:1B:B9:58:8B:B2 inet6 addr:fe80::21b:b9ff:fe58:8bb2/64 Scope:Link UP BROADCAST SLAVEMULTICAST MTU:1500 Metric:1 RX packets:0 errors:0dropped:0 overruns:0 frame:0 TX packets:10 errors:0dropped:0 overruns:0 carrier:0 collisions:0txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:756 (756.0 b) Interrupt:11 Baseaddress:0x1000 lo Link encap:Local Loopback inetaddr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128Scope:Host UP LOOPBACKRUNNING MTU:16436 Metric:1 RX packets:2129 errors:0dropped:0 overruns:0 frame:0 TX packets:2129 errors:0dropped:0 overruns:0 carrier:0 collisions:0txqueuelen:0 RX bytes:1998893 (1.9MiB) TX bytes:1998893 (1.9 MiB) sit0 Link encap:IPv6-in-IPv4 NOARP MTU:1480 Metric:1 RX packets:0 errors:0dropped:0 overruns:0 frame:0 TX packets:0 errors:0dropped:0 overruns:0 carrier:0 collisions:0txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)附：
DEVICE=物理设备名 IPADDR=IP地址 NETMASK=掩码值 NETWORK=网络地址 BROADCAST=广播地址 GATEWAY=网关地址 ONBOOT=[yes|no]（引导时是否激活设备） USERCTL=[yes|no]（非root用户能否够控制该设备） BOOTPROTO=[none|static|bootp|dhcp]（引导时不使用协议|静态分配|BOOTP协议|DHCP协议） HWADDR = 你的MAC地址