Linux dual NIC binds to logical NIC

The network card bond is a kind of common technology in the production scene, which is bound by multi-net cards as a logical NIC, which realizes the redundancy, bandwidth expansion and load balance of the local network card.

The production environment server is: DELL

The NIC is: Fiber

Bond needs to modify the NIC configuration file involved

/etc/network-scripts/ifcfg-em1/etc/network-scripts/ifcfg-em2

　　

New configuration file Required

/etc/network-scripts/ifcfg-bond0

　　

To facilitate quick configuration, I put the configuration file on the USB flash drive (requires four files in the USB flash drive, the configuration of ifcfg-em1,ifcfg-em2,ifcfg-bond0, script cfg.sh), the script form of rapid configuration.

IFCFG-EM1 content is as follows

Device=em1name=em1hwaddr=80:18:44:ea:8b:b0type=ethernetonboot=yesmaster=bond0slave=yesnm_controlled= Nobootproto=noneuserctl=no

　　

IFCFG-EM2 content is as follows

Device=em2name=em2hwaddr=80:18:44:ea:8b:b1type=ethernetonboot=yesnm_controlled=nobootproto=noneuserctl= Nomaster=bond0slave=yes

　　

Ifcfg-bond0 content is as follows

Device=bond0type=bondname=bond0bootproto=noneonboot=yesipaddr=10.16.28.216prefix=24userctl=nobonding_master= yesipv4_failure_fatal=yesipv6init=nobonding_opts= "mode=4 miimon=100 downdelay=200 updelay=200 lacp_rate=1 Xmit_hash _policy=2 "bonding_slave_0=em1bonding_slave_1=em2nm_controlled=nogateway=10.16.28.4

　　

cfg.sh script content is as follows

#脚本需要两个参数, this machine needs to configure the IP address, the native gateway address ip=$1gw=$2# to determine whether a given parameter, execute script without given parameters, script exits if [$IP = '-o $GW = ']thenecho ' IP or gateway wrong ' exitfi# the original NIC information on the backup device, my network card name is EM1 and em2cp/etc/sysconfig/network-scripts/ifcfg-em1/etc/sysconfig/network-scripts/ ifcfg-em1.bakcp/etc/sysconfig/network-scripts/ifcfg-em2/etc/sysconfig/network-scripts/ifcfg-em2.bak# Copy the prepared NIC configuration file to the specified directory cp/media/omsa71-cent/boot/ifcfg-*/etc/sysconfig/network-scripts/#将原网卡hwaddr信息恢复到配置文件cd/etc/ Sysconfig/network-scripts/sed-i s/' grep HWADDR ifcfg-em1 '/' grep HWADDR ifcfg-em1.bak '/ifcfg-em1sed-i s/' grep HWADDR if Cfg-em2 '/' grep HWADDR ifcfg-em2.bak '/ifcfg-em2# replace the IP address information in the configuration file to the native IP address sed-i s/10.16.28.216/$ip/ifcfg-bond0# Replace the gateway address information in the configuration file for the native gateway address sed-i s/10.16.28.4/$GW/ifcfg-bond0# View the changed configuration information grep 10.16.28 ifcfg-bond0# Modify the server startup mode to command line mode, Instead of graphical interface form sed-i s/id:5:/id:3://etc/inittabsleep aa off iptables and Selinuxservcie iptables stopchkconfig iptables--level 12345 offsetenforce 0sed-i s/selinux=enforcing/selinux=disabled//etc/selinux/config# Manually Restart the device for the configuration to take effect [inIt 6] 

　　

Script Execution Example

#配置ip地址为10.16.28.200, configure the gateway address to 10.16.28.5sh-x cfg.sh 10.16.28.200 10.16.28.5

　　

Linux dual NIC binds to logical NIC