CentOS 8 的网络配置

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CentOS 7

/etc/init.d/network restart

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CentOS 8 上使用 nmcli​ 管理网络配置：

# 检查 NetworkManager 服务是否启动
# systemctl status NetworkManager.service

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[root@localhost ~]# nmcli device status
DEVICE  TYPE      STATE      CONNECTION
ens33   ethernet  connected  ens33
lo      loopback  unmanaged  --
[root@localhost ~]#

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网上的配置文件路径不变：

[root@localhost ~]# ll /etc/sysconfig/network-scripts/ifcfg-ens33
-rw-r--r--. 1 root root 271 Apr  7 09:55 /etc/sysconfig/network-scripts/ifcfg-ens33
[root@localhost ~]#

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查看 ens33​ 网上的信息：

[root@localhost ~]# nmcli device show ens33
GENERAL.DEVICE:                         ens33
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:51:B3:FA
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     ens33
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/1
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.30.242/22
IP4.GATEWAY:                            192.168.30.1
IP4.ROUTE[1]:                           dst = 192.168.28.0/22, nh = 0.0.0.0, mt = 100
IP4.ROUTE[2]:                           dst = 0.0.0.0/0, nh = 192.168.30.1, mt = 100
IP4.DNS[1]:                             192.168.0.7
IP4.DNS[2]:                             202.96.209.133
IP6.ADDRESS[1]:                         fe80::20c:29ff:fe51:b3fa/64
IP6.GATEWAY:                            --
IP6.ROUTE[1]:                           dst = fe80::/64, nh = ::, mt = 1024
[root@localhost ~]#

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修改网卡配置信息后，重新加载并启用或激活网卡配置：

​nmcli connection reload​ 或 nmcli c reload​，

​nmcli c up ens33​

[root@localhost ~]# nmcli c reload
[root@localhost ~]#
[root@localhost ~]# nmcli c up ens33
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/2)
[root@localhost ~]#

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使用 DHCP 时的配置：

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=eui64
NAME=ens33
UUID=18fb67f5-5aa6-4891-9fec-c94aced0a369
DEVICE=ens33
ONBOOT=yes

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改为静态IP后的配置：

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
# BOOTPROTO 改为 static
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=eui64
NAME=ens33
UUID=18fb67f5-5aa6-4891-9fec-c94aced0a369
DEVICE=ens33
ONBOOT=yes
# 配置IP信息
IPADDR=192.168.30.242
NETMASK=255.255.255.0
GATEWAY=192.168.30.1
DNS1=192.168.0.7
DNS2=116.228.111.118

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[root@localhost ~]# vi !$
vi /etc/sysconfig/network-scripts/ifcfg-ens33
[root@localhost ~]# 
[root@localhost ~]# nmcli c reload
[root@localhost ~]# nmcli c up ens33
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/3)
[root@localhost ~]#
[root@localhost ~]# ifconfig ens33
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.30.242  netmask 255.255.255.0  broadcast 192.168.30.255
        inet6 fe80::20c:29ff:fe51:b3fa  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:51:b3:fa  txqueuelen 1000  (Ethernet)
        RX packets 33893  bytes 3840624 (3.6 MiB)
        RX errors 0  dropped 866  overruns 0  frame 0
        TX packets 1401  bytes 174662 (170.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]#

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