Dual NIC bindings under CentOS

Servers such as streaming media use a single network card load is too high, may cause a picture of the situation, in order to alleviate network pressure, special dual-NIC binding.

Here we bind 2 1GB of network card, so that its bandwidth reaches 2GB, thus reducing network congestion.

1. Modify the/ETC/SYSCONFIG/NETWORK-SCRIPTS/IFCFG-ETH0/1 configuration document with the following contents:

Bootproto=none Onboot=yes master=bond0 Slave=yes

2. Create a binding network port configuration document/ETC/SYSCONFIG/NETWORK-SCRIPTS/IFCFG-BOND0, which reads as follows:

Device=bond0bootproto=static ipaddr=52.110.1.2netmask=255.255.255.0gateway=52.110.1.1boradcast= 52.110.1.255onboot=yestype=ethernet

3. Modify/etc/modprobe.d/dist.conf, configure the binding model, and finally add the following to the configuration file:

Alias Bond0 bondingoptions bond0 miimon=100 mode=0

#选项 Millmon is the specified interval for how long the link is monitored, in Ms.

#选项 mode is the operating mode of the binding port, there are 0-7 total 7 modes, commonly used in 0 and 1 mode, mode=0 means "round-robin" strategy, two cards work simultaneously in load balancing state. The mode=1 represents the "active-backup" policy, and the backup status of the two cards is one with one standby.

4. Modify the/etc/rc.local, which is responsible for binding the virtual network card and two physical network card when the system starts up, add the following content:

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

5. Restart the network card to make it effective

Service Network restart

Note: The NetworkManager service is turned off and set to on without booting to prevent interference-related actions

Service NetworkManager Stopchkconfig NetworkManager off

Test: Turn off any of the bundled network cards and the networks are unaffected.

Attached: Test NIC interface Speed Ethtool

[[email protected] ~]# ethtool eth0settings for eth0:         Supported ports: [ TP ]         Supported link modes:   10baseT/Half 10baseT/Full                                   100baseT/Half 100baseT/Full                                   1000baseT/Full          Supported pause frame use: No         Supports auto-negotiation: Yes         advertised link modes:  10baset/half 10baset/full                                   100baseT/Half 100baseT/Full                                   1000baseT/Full          Advertised pause frame use: No         advertised auto-negotiation: yes        speed: 1000mb/s         Duplex: Full         Port: Twisted Pair        PHYAD: 1       &nBsp; transceiver: internal        auto-negotiation: on         MDI-X: off         Supports Wake-on: pumbg        Wake-on: g         Current message level: 0x00000007  (7)                                  drv probe link         link detected: yes

This article is from the "Dream Life" blog, please be sure to keep this source http://hzde0128.blog.51cto.com/918211/1836378

Dual NIC bindings under CentOS