Linux Dual NIC Bindings

1. Create a virtual NIC as a configuration file to bind the network port/ETC/SYSCONFIG/NETWORK-SCRIPTS/IFCFG-BOND0

The configuration content is as follows:

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

Device=bond0 #虚拟网卡名称

Type=ethernet

Onboot=yes

Bootproto=static

ipaddr=192.168.11.130 #IP地址

netmask=255.255.255.0 #子网掩码

gateway=192.168.11.2 #网关

dns1=223.5.5.5 #DNS地址

dns2=223.6.6.6

bonding_opts=miimon=100 mode=0

2, modify the/etc/sysconfig/network-scripts/ifcfg-eth0 configuration, the content is as follows:

Device=eth0

Type=ethernet

Onboot=yes

Bootproto=none

Master=bond0

Slave=yes

Modify the/etc/sysconfig/network-scripts/ifcfg-eth1 configuration with the following content:

Device=eth1

Type=ethernet

Onboot=yes

Bootproto=none

Master=bond0

Slave=yes

3, modify the/etc/modprobe.d/dist.conf, configure the binding model, the configuration file finally added the following content

#tail-2/etc/modprobe.d/dist.conf

Alias Bond0 Bonding

Options Bond0 miimon=100 mode=0

#选项 Miimon Specifies how long it takes to monitor the link, in Ms.

#选项 mode indicates the working mode of the binding port, there are 0-6 total 7 modes, which are commonly used in 0 and 1 modes,

Mode=0 represents the "Round-robin" policy, and the two cards work simultaneously in a load-balanced state.

The mode=1 represents the "active-backup" policy, and the backup status of the two cards is one with one standby.

Use/etc/init.d/network Restart to restart the network after the above configuration has been modified.

To prevent the server from restarting, add the following to the/etc/rc.local:

#echo "Ifenslave bond0 eth0 eth1" >>/etc/rc.local

Check if join is successful

#tail-1/etc/rc.local

Ifenslave bond0 eth0 eth1

4. Testing

After any piece of network card is Ifdown, it does not affect the normal communication of the server

Linux Dual NIC Bindings