Linux system dual NIC binding

Linux system to do a dual-NIC binding, after experiments to obtain the following steps

System version: Centosrelease 6.8 (Final)

System kernel version:2.6.32-642.el6.x86_64

The 1.1 NIC is configured as follows

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 configuration /etc/modprobe.d/dist.conf file, plus the following configuration

Alias Bond0 Bonding

Options bond0 miimon=100 mode=1 #若想使用负载均衡模式, modify the mode=0, other configurations are not moved

Description

Miimon is the number of milliseconds, triggering an event that detects line stability every 100 milliseconds
Mode is the working state of Ifenslave.

Miimon=100 means that the system every 100MS monitoring link connection status, if one line is not connected to another line (this monitoring is monitoring the server to the switch between the lines, the switch above the line is disconnected, this monitoring line also shows that there is no failure problem)

Mode=1 represents Active-backup, provides redundancy, the mode of operation is the main standby, by default, only one network card work, the other to do backup network card

Mode=0 represents Round-robin, load balancing, this state does not increase the bandwidth, just in two network card polling work, the bandwidth rate of the two network cards is average, but also support fault tolerance (this state requires the switch to do the aggregation port)

1.3 configuration /etc/rc.local, plus the following configuration

Ifenslave bond0 eth0 eth1 #启动将eth0, eth1 bound to Bond0

Route add default GW 192.168.137.1 bond0 #启动添加默认网关

1.4 Viewing network card information

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)

Description

bond0 , eth0 , eth1 of the MAC the addresses are all the same.

1.5 View bond0 information

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

Description

actual eth0 and the eth1 of the MAC The address is not the same

1.6 Test Results

Ping192.168.137.10–t

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Physical Disconnect eth0:

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View bond0 information:eth0 disconnected, system using eth1 Nic

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

This article is from the "Bin Less Technology blog" blog, please be sure to keep this source http://yinjianbin.blog.51cto.com/4529118/1879886

Linux system dual NIC binding