linux双网卡负载均衡bonding使用方法

Bonding orLAG

You will need netcfg from
the Official Repositories, as well as the netcfg-bonding package
from the AUR.
Edit/create the following files:
Create /etc/network.d/bonded:

/etc/network.d/bonded

 CONNECTION="bonding"

INTERFACE="bond0"

SLAVES="eth0 eth1"

IP="dhcp"

DHCP_TIMEOUT=10

Edit your /etc/rc.conf:

/etc/rc.conf

 MODULES=(... bonding ...)

...

interface=bond0 #comment other lines (address,netmask,gateway,...)

...

NETWORKS=(... bonded ...)

...

DAEMONS=(... net-profiles ...) #replace network

To activate the new bonded ports modprobe bonding, stop network and
start the net-profiles service:

# modprobe bonding

# rc.d stop network

# rc.d start net-profiles

系统环境

CentOS 5.3

目前主流的Linux内核(2.6)已经默认支持bonding模块，无需做特别处理。
配置步骤
编写bond0网卡配置

# vi /etc/sysconfig/network-scripts/ifcfg-bond0

DEVICE=bond0

IPADDR=192.168.1.20

NETWORK=192.168.1.0

NETMASK=255.255.255.0

BOOTPROTO=none

ONBOOT=yes

修改eth0和eth1网卡配置

# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

ONBOOT=yes

MASTER=bond0

SLAVE=yes

BOOTPROTO=none

# vi /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1

ONBOOT=yes

MASTER=bond0

SLAVE=yes

BOOTPROTO=none

加载bonding模块

# vi /etc/modprobe.conf

alias bond0 bonding

options bond0 miimon=100 mode=6

#注: bond options中miimon指定了MII连接监控频率(微秒)，mode指定bond的策略，6为balance-alb模式，此模式不需要交换机特别配置支持，bond的参数具体参考这里

装载bonding模块

# modprobe bonding

重启网络服务

# service network restart

检查配置生效

# cat /proc/net/bonding/bond0

# ifconfig

Manualassignment

You can assign a static IP address in theconsole:

# ip addr add <ip address>/<netmask> dev <interface>

For example:

# ip addr add 192.168.1.2/24 dev eth0

For more options, see: 

man ip

Add your gateway like so:

# ip route add default via <ip address>

(Substitute your own gateway's IP address)
For example:

# ip route add default via 192.168.1.1