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linux系统双网卡绑定

linux系统做双网卡绑定,经过实验得出以下步骤

系统版本:CentOSrelease 6.8 (Final)

系统内核版本:2.6.32-642.el6.x86_64

1.1网卡配置如下

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

DEVICE=eth0

ONBOOT=yes

BOOTPROTO=dhcp

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

DEVICE=eth1

ONBOOT=yes

BOOTPROTO=dhcp

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

DEVICE=bond0

TYPE=Ethernet

ONBOOT=yes

BOOTPROTO=static

IPADDR=192.168.137.10

NETMASK=255.255.255.0

DNS1=202.96.128.166

1.2配置/etc/modprobe.d/dist.conf文件,加上以下配置

alias bond0 bonding

options bond0 miimon=100 mode=1  #若想使用负载均衡模式,修改mode=0,其他配置不动即可

说明:

miimon是毫秒数,每100毫秒触发检测线路稳定性的事件
mode 是ifenslave的工作状态

miimon=100表示系统每100ms监控一次链路连接状态,如果有一条线路不通就转入另一条线(此监控是监控服务器到交换机之间的线路,交换机以上的线路断开了,此监控线路也显示没有故障问题)

mode=1表示active-backup,提供冗余功能,工作方式是主备,默认情况下只有一块网卡工作,另一块做备份网卡

mode=0表示round-robin,负载均衡,此状态并没有增加带宽,只是在两块网卡轮询工作,两块网卡的带宽速率是平均的,同时也支持容错能力(此状态需要交换机做聚合端口)

1.3配置/etc/rc.local,加上以下配置

ifenslave bond0 eth0 eth1                #启动将eth0、eth1绑定成bond0

route add default gw 192.168.137.1 bond0  #启动添加默认网关

1.4查看网卡信息

ifconfig

bond0     Linkencap:Ethernet  HWaddr 00:0C:29:A6:77:FA 

          inetaddr:192.168.137.10 Bcast:192.168.137.255 Mask:255.255.255.0

          inet6 addr:fe80::20c:29ff:fea6:77fa/64 Scope:Link

          UP BROADCAST RUNNINGMASTER MULTICAST  MTU:1500  Metric:1

          RX packets:1737errors:0 dropped:0 overruns:0 frame:0

          TX packets:930errors:0 dropped:0 overruns:0 carrier:0

          collisions:0txqueuelen:0

          RX bytes:138239(134.9 KiB)  TX bytes:105449 (102.9 KiB)

 

eth0      Linkencap:Ethernet  HWaddr 00:0C:29:A6:77:FA 

          inet6 addr:fe80::20c:29ff:fea6:77fa/64 Scope:Link

          UP BROADCAST RUNNINGSLAVE MULTICAST  MTU:1500  Metric:1

          RX packets:1521errors:0 dropped:0 overruns:0 frame:0

          TX packets:746errors:0 dropped:0 overruns:0 carrier:0

          collisions:0txqueuelen:1000

          RX bytes:124324(121.4 KiB)  TX bytes:94507 (92.2 KiB)

 

eth1      Link encap:Ethernet  HWaddr 00:0C:29:A6:77:FA 

          UP BROADCAST RUNNINGSLAVE MULTICAST  MTU:1500  Metric:1

          RX packets:221errors:0 dropped:0 overruns:0 frame:0

          TX packets:199errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RXbytes:15061 (14.7 KiB)  TX bytes:12592(12.2 KiB)

说明:

bond0eth0eth1MAC地址都是一样的

1.5查看bond0信息

cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

 

Bonding Mode: fault-tolerance (active-backup#主备模式

Primary Slave: None

Currently Active Slave: eth0

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

 

Slave Interface: eth0

MII Status: up

Speed: 1000 Mbps

Duplex: full

Link Failure Count: 0

Permanent HW addr: 00:0c:29:a6:77:fa

Slave queue ID: 0

 

Slave Interface: eth1

MII Status: up

Speed: 1000 Mbps

Duplex: full

Link Failure Count: 0

Permanent HW addr: 00:0c:29:a6:77:04

Slave queue ID: 0

说明:

实际eth0eth1MAC地址是不一样的

1.6测试效果

ping192.168.137.10 –t

技术分享

物理断开eth0

技术分享

查看bond0信息:eth0断开,系统使用eth1网卡

cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

 

Bonding Mode: fault-tolerance (active-backup)

Primary Slave: None

Currently Active Slave: eth1

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

 

Slave Interface: eth0

MII Status: down

Speed: Unknown

Duplex: Unknown

Link Failure Count: 1

Permanent HW addr: 00:0c:29:a6:77:fa

Slave queue ID: 0

 

Slave Interface: eth1

MII Status: up

Speed: 1000 Mbps

Duplex: full

Link Failure Count: 0

Permanent HW addr: 00:0c:29:a6:77:04

Slave queue ID: 0


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linux系统双网卡绑定