CentOS 7에서 C 클래스 전체 설정

1. networkmanager stop 및 disable

[root@EhostICT backup]# systemctl stop NetworkManager

[root@EhostICT backup]# systemctl disable NetworkManager

2. network 서비스 enable 및 등록

[root@EhostICT backup]# chkconfig --add network
[root@EhostICT backup]# chkconfig --levels 345 network on

3. ip 대역 등록

[root@EhostICT ~]# vi /etc/sysconfig/network-scripts/ifcfg-em1-range0 
DEVICE=em1
ONBOOT=yes
BOOTPROTO=static
IPADDR_START=192.168.9.3 (시작 IP)
IPADDR_END=192.168.9.254 (종료 IP)
CLONENUM_START=3 ( em1:3 부터 시작)
NETMASK=255.255.255.0
NO_ALIASROUTING=yes

4. network 서비스 재시작

[root@EhostICT backup]# systemctl restart network

5. 결과

a. IP 개당 4초 정도 up

em1:148: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.9.148 netmask 255.255.255.0 broadcast 192.168.9.255
ether 00:a0:d1:eb:68:74 txqueuelen 1000 (Ethernet)
device memory 0xfbde0000-fbdfffff

em1:149: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.9.149 netmask 255.255.255.0 broadcast 192.168.9.255
ether 00:a0:d1:eb:68:74 txqueuelen 1000 (Ethernet)
device memory 0xfbde0000-fbdfffff

em1:150: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.9.150 netmask 255.255.255.0 broadcast 192.168.9.255
ether 00:a0:d1:eb:68:74 txqueuelen 1000 (Ethernet)
device memory 0xfbde0000-fbdfffff

em1:151: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.9.151 netmask 255.255.255.0 broadcast 192.168.9.255
ether 00:a0:d1:eb:68:74 txqueuelen 1000 (Ethernet)
device memory 0xfbde0000-fbdfffff