[root@proxy ~]# cd /etc/sysconfig/network-scripts

[root@proxy network-scripts]# cp ifcfg-eth0{,:}

[root@proxy network-scripts]# vim ifcfg-eth0:

TYPE=Ethernet

BOOTPROTO=none

DEFROUTE=yes

NAME=eth0:

DEVICE=eth0:

ONBOOT=yes

IPADDR=192.168.4.15

PREFIX=

[root@proxy network-scripts]# service network restart 

[root@web1 ~]# nmcli connection modify eth0 ipv4.method manual \

ipv4.addresses 192.168.4.100/ connection.autoconnect yes

[root@web1 ~]# nmcli connection up eth0

[root@web1 ~]# cd /etc/sysconfig/network-scripts/

[root@web1 ~]# cp ifcfg-lo{,:}

[root@web1 ~]# vim ifcfg-lo:

DEVICE=lo:

IPADDR=192.168.4.15

NETMASK=255.255.255.255

NETWORK=192.168.4.15

BROADCAST=192.168.4.15

ONBOOT=yes

NAME=lo:

[root@web1 ~]# vim /etc/sysctl.conf

#手动写入如下4行内容

net.ipv4.conf.all.arp_ignore =

net.ipv4.conf.lo.arp_ignore =

net.ipv4.conf.lo.arp_announce =

net.ipv4.conf.all.arp_announce =

#当有arp广播问谁是192.168.4.15时，本机忽略该ARP广播，不做任何回应

#本机不要向外宣告自己的lo回环地址是192.168.4.

[root@web1 ~]# sysctl -p

[root@web2 ~]# nmcli connection modify eth0 ipv4.method manual \

ipv4.addresses 192.168.4.200/ connection.autoconnect yes

[root@web2 ~]# nmcli connection up eth0

[root@web2 ~]# cd /etc/sysconfig/network-scripts/

[root@web2 ~]# cp ifcfg-lo{,:}

[root@web2 ~]# vim ifcfg-lo:

DEVICE=lo:

IPADDR=192.168.4.15

NETMASK=255.255.255.255

NETWORK=192.168.4.15

BROADCAST=192.168.4.15

ONBOOT=yes

NAME=lo:

[root@web2 ~]# vim /etc/sysctl.conf

#手动写入如下4行内容

net.ipv4.conf.all.arp_ignore =

net.ipv4.conf.lo.arp_ignore =

net.ipv4.conf.lo.arp_announce =

net.ipv4.conf.all.arp_announce =

#当有arp广播问谁是192.168.4.15时，本机忽略该ARP广播，不做任何回应

#本机不要向外宣告自己的lo回环地址是192.168.4.

[root@web2 ~]# sysctl -p

[root@web2 ~]# systemctl restart network