双网卡绑定-bond0

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=yes

2.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=0

4.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 eth1

5.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:c8

7.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:B2

inet 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)