How to add ip addresses and gateways to Centos7
This article introduces the knowledge of "how to add ip addresses and gateways to Centos7". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
1. View os version
[root@oracle network-scripts] # cat / etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
two。 Check which network port is linked. In many cases, there is more than one network port on the server. In this example, there are four. You need to determine which network port is plugged into the current network cable. In this case, if em1 is in the linked state, then configure the em1 when configuring ip.
[root@oracle network-scripts] # nmcli dev status
DEVICE TYPE STATE CONNECTION
Em2 ethernet unavailable--
P1p1 ethernet unavailable--
P1p2 ethernet unavailable--
Em1 ethernet connected--
Lo loopback unmanaged--
3. Modify the file, red is added and modified, BOOTPROTO=dhcp, changed from dhcp to static
NM_CONTROLLED=no indicates that the port will be set through the configuration file
ONBOOT=yes means that the network card starts automatically when it starts.
Vi / etc/sysconfig/network-scripts/ifcfg-em1
TYPE=Ethernet
BOOTPROTO=static
IPADDR=172.24.80.236
NETMASK=255.255.255.0
GATEWAY=172.24.80.1
NM_CONTROLLED=no
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=em1
UUID=67ac8318-e715-4081-9ef7-781140c62cb1
DEVICE=em1
ONBOOT=yes
4. Restart the service
Systemctl restart network.service
5. Verify that the interface is configured correctly
[root@oracle network-scripts] # ip add
1: lo: 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: em1: mtu 1500 qdisc mq state UP qlen 1000
Link/ether d0:94:66:3e:ae:d0 brd ff:ff:ff:ff:ff:ff
Inet 172.24.80.236/24 brd 172.24.80.255 scope global em1
Valid_lft forever preferred_lft forever
Inet6 fe80::d294:66ff:fe3e:aed0/64 scope link
Valid_lft forever preferred_lft forever
3: em2: mtu 1500 qdisc mq state DOWN qlen 1000
Link/ether d0:94:66:3e:ae:d1 brd ff:ff:ff:ff:ff:ff
4: p1p1: mtu 1500 qdisc mq state DOWN qlen 1000
Link/ether d0:94:66:3e:bf:03 brd ff:ff:ff:ff:ff:ff
5: p1p2: mtu 1500 qdisc mq state DOWN qlen 1000
Link/ether d0:94:66:3e:bf:04 brd ff:ff:ff:ff:ff:ff
6. View the network port status
[root@oracle network-scripts] # nmcli dev status
DEVICE TYPE STATE CONNECTION
Em2 ethernet unavailable--
P1p1 ethernet unavailable--
P1p2 ethernet unavailable--
Em1 ethernet unmanaged--
Lo loopback unmanaged--
This is the end of the introduction to "how to add ip addresses and gateways to Centos7". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!
