linux centos熱備网卡绑定

linux centos熱備网卡绑定


1、编辑虚拟网络接口配置文件(bond0),并指定网卡IP

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

DEVICE=bond0

BOOTPROTO=static

IPADDR=192.168.1.2

NETMASK=255.255.255.0

GATEWAY=192.168.1.1

USERCTL=no

ONBOOT=yes

TYPE=Ethernet

BONDING_OPTS="mode=1 miimon=100"

注意:建议不要指定MAC地址


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

DEVICE=eth0

ERCTL=no

ONBOOT=yes

MASTER=bond0

SLAVE=no

BOOTPROTO=none


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

DEVICE=eth1

USERCTL=no

ONBOOT=no

MASTER=bond0

SLAVE=no

BOOTPROTO=none


2、编辑模块载入配置文件(/etc/modprobe.conf或者/etc/modprobe.d目录下新建一个文件),开机自动加载bonding模块到内核

 

 vi /etc/modprobe.d/bonding.conf

 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


3、加入开机启动

[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 或者 重器服務器,


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)




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