CentOS下双网卡绑定-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。

加载bonding驱动   #modprobe bonding

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.修改/etc/modprobe.conf 文件,同样做好备份,最后加入2行
  alias bond0 bonding
  options bond0 miimon=100 mode=1
注:
(1)、miimon 是链路监测的时间间隔单位是毫秒,miimon=100的意思就是,每100毫秒检测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,需要交换机作支持
          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

[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 加入如下一行
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.重新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)

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用户是否可以控制该设备)
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

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