Question:
How to switch from Dynamic to static in my CentOS 7?
Answer:
Before to convert from dynmic to static, please make an copy of resolv.conf under etc folder.
cp /etc/resolv.conf /etc/resolv.conf.backup
1 – Please edit “/etc/sysconfig/network-scripts/ifcfg-enp0s3”.
TYPE=Ethernet BOOTPROTO=static DEFROUTE=yes PEERDNS=yes PEERROUTES=yes IPV4_FAILURE_FATAL=no IPADDR=10.1.1.200 IPV6INIT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_PEERDNS=yes IPV6_PEERROUTES=yes IPV6_FAILURE_FATAL=no NAME=enp0s3 UUID=75a170ba-6bfa-4553-8070-e658eb8ffb1e ONBOOT=yes
save and exit.
2 – Set gateway and networking
vi /etc/sysconfig/network #add NETWORKING=yes HOSTNAME=unixmen-centos7 GATEWAY=10.1.1.253
save and exit.
3 – Restart your network or reboot
4 – Restore the resolv.conf backup file.
Check your network again:
[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:7a:7a:3f brd ff:ff:ff:ff:ff:ff
inet 10.1.1.200/8 brd 10.255.255.255 scope global enp0s3
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fe7a:7a3f/64 scope link
valid_lft forever preferred_lft forever
[root@localhost ~]#
5 – PING
[root@localhost ~]# ping google.nl PING google.nl (173.194.65.94) 56(84) bytes of data. 64 bytes from ee-in-f94.1e100.net (173.194.65.94): icmp_seq=1 ttl=48 time=7.20 ms 64 bytes from ee-in-f94.1e100.net (173.194.65.94): icmp_seq=2 ttl=48 time=7.61 ms 64 bytes from ee-in-f94.1e100.net (173.194.65.94): icmp_seq=3 ttl=48 time=7.22 ms 64 bytes from ee-in-f94.1e100.net (173.194.65.94): icmp_seq=4 ttl=48 time=7.87 ms 64 bytes from ee-in-f94.1e100.net (173.194.65.94): icmp_seq=5 ttl=48 time=7.49 ms
Done.
