"Adding and binding of Linux NIC aliases" RHEL6

Configuration of NIC aliases:

This and ifconfig temporarily modify the network card IP is similar, but not the same. Are temporary, just restart the computer will be gone.

With permanent IP aliases:

CP Ifcfg-eth0 ifcfg-eth0:0

Vim ifcfg-eth0:0

This is going to work out, right?

Restart the network, it's OK.

NIC binding: The virtual machine is a 2 nic, a eth0 piece of eth1.

Linux supports the bundling of multiple physical network cards into a single logical network card, which allows two or more network interfaces to be used as a single networking interface, thereby increasing bandwidth and/or providing redundancy.

Select Linux Ethernet Binding Mode

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Mode 0 (Balanced round robin)-round robin, all interfaces are used. Use round robin to transfer packets in all Slave;

Slave can be received.

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Mode 1 (active backup)-fault tolerance. Only one Slave interface can be used at a time, but if the interface fails, the other Slave

will replace it.

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Mode 3 (broadcast)-fault tolerance. All packets are broadcast through all Slave interfaces.

Additional binding modes are described in the kernel document Networking/bonding.txt file.

Configuration file for Nic:

Below is the configuration of which 2 NICs are configured and the logical NIC

Logical NIC:

Configure the system to load the bonding module:

Additional slave interface to bond0

/etc/rc.d/rc.local

Ifenslave bond0 eth0 eth1

Reboot restart System

View bonding Status:

Cat/proc/net/bonding/bond0

Using Ifdown eth0 will find that the eth1 will be on top immediately when the eth0 is bad.

Tuning of kernel network parameters:

Cd/proc/sys/net/ipv4 prevent others from pinging

Allow other hosts to ping