Linux system dual NIC binding order an IP address

Double NIC binding order IP address in order to provide high availability of the network, we may need to bind multiple network cards into a virtual network card to provide services, so that even if one of the physical network card failure, it will not cause connection interruption. Multiple NIC bindings.

In order to provide high availability of the network, we may need to bind multiple network cards into a single virtual NIC to provide services, so that even if one of the physical network card fails, it will not cause the connection to be interrupted. Under Linux called BONDING,IBM called Etherchanel,broadcom team, but the name of how to change, the effect is to two or more cards as a network card use, in addition to increase the bandwidth can also improve redundancy. For example, we can bind eth0 and eth1 into a virtual NIC bond0 under CentOS 6.3.

As shown in figure:

Experimental configuration:

Mode=1: Fault-tolerance (active-backup) provides redundancy, working mode is the main standby mode of work, one of the network card in the work (if the eth0 broken), then automatically switch to another block card (eth1 do Backup).

System	Device Name	IP Address	Subnet mask
CentOS 6.3_64bit	Eth0
Eth1
Bond0	10.1.3.210	255.255.255.0

1, view the host network card

[Root@web ~]# cd/etc/sysconfig/network-scripts/

[Root@web1 network-scripts]# LL

Total 200

-rw-r--r--. 1 root 212 Mar 22:15 Ifcfg-eth0

-rw-r--r--1 root root 212 Mar 19:10 ifcfg-eth1