Linux dual NIC for load balancing (Centos or Ubuntu)

Bind two network cards, share one IP, realize the redundancy effect. In fact, there are 7 types of bindings for Linux dual NICs:

• The mode=0 indicates that load balancing (round-robin) is balanced, and both NICs work.

• mode=1 says Fault-tolerance (active-backup) provides redundancy, working in a master-slave way, which means that only one NIC works by default, and the other is backed up.

• Mode=2 indicates that the XOR policy is a balanced strategy. This mode provides load balancing and fault tolerance

• Mode=3 indicates that broadcast is a broadcast policy. This mode provides fault tolerance

• Mode=4 represents the IEEE 802.3ad dynamic Link Aggregation for IEEE 802.3ad as a dynamically linked aggregation. This policy can be changed from the default XOR policy to other policies through the Xmit_hash_policy option.

• The mode=5 represents Adaptive transmit load balancing for the adapter transport balancing. Required for this pattern: Ethtool supports getting the rate per slave

• Mode=6 indicates that the Adaptive load balancing is an adaptive load balancer for the adapter. This mode includes the BALANCE-TLB mode, plus receive load balancing for IPV4 traffic (receive load balance, RLB), and does not require any switch (switch) support.

Centos dual NIC for load balancing.

1. New/etc/sysconfig/network-scripts/ifcfg-bond0 file, vi ifcfg-bond0
   

Device=bond0onboot=yesbootproto=staticipaddr=192.168.0.23netmask=255.255.255.224gateway=192.168.128.233userctl =no

2. Change/etc/sysconfig/network-scripts/ifcfg-eth0 NIC Properties, VI ifcfg-eth0

Device=eth0onboot=yesbootproto=nonemaster=bond0userctl=no

3. Change the properties of the/etc/sysconfig/network-scripts/ifcfg-eth1 NIC, vi ifcfg-eth1

Device=eth1onboot=yesbootproto=nonemaster=bond0userctl=no

4. Edit the/etc/modprobe.conf file, add the following, VI modprobe.conf

Alias Bond0 bondingoptions bond0 miimon=100 mode=0

ESC Exit Edit: qw! Exit save.

Ubuntu dual NIC for load balancing.

1. Installing the Load Software

Apt-get Install Ifenslave

2. Load the module and configure the load, Vi/etc/modules

Bonding Mode=0 Miimon=100#miimon is a 10ms monitoring network card status

3. Edit interface, vi/etc/network/interfaces

 # This file describes the network interfaces available on  Your system# and how to activate them. for more information,  see interfaces (5) . # the loopback network interfaceauto loiface  lo inet loopback  #注释掉原来的eth0, eth1 configuration # the primary network interface#auto  eth0#iface eth0 inet dhcp  #auto  eth1#iface eth1 inet dhcp # Here the configuration mode is the polling policy, the pattern code is 0, and the polling interval is 100ms (milliseconds). up ifenslave bond0 eth0 eth1down ifenslave bond0 -d eth0  eth1bond-mode 0bond-miimon 100  #配置bond的IPauto  bond0iface bond0 inet  staticaddress 192.168.0.201netmask 255.255.255.0gateway 192.168.0.1  #配置bond的虚拟IP (not required) auto  bond0:1iface bond0:1 inet staticaddress 192.168.1.201netmask  255.255.255.0gateway 192.168.1.1 

3. Load bonding module, sudo vi/etc/modules

Bonding

4, restart the computer, if successful, bond0, eth0, eth1 MAC address will become the original Eth0 Mac.

sudo shutdown-r now

5. View bonding Status

Cat/proc/net/bonding/bond0

This article is from the "Work Experience record sharing" blog, please be sure to keep this source http://taskkill.blog.51cto.com/879236/1840784

Linux dual NIC for load balancing (Centos or Ubuntu)