实验-禁用网卡命名规则:

在GRUB_CMDLINE_Linux=“rd.lvm.lv=rhel/root  vconsole.keymap=us vconsole.font=latarcyheb-sunl6 crashkernel=auto rhgb quiet net.ifnames=0 bios sdevname=0"行尾的引号内部加入 net.ifnames=0 biosdevname=0 参数

grub2-mkconfig - o /boot/grub2/grub.cfg

重启后系统将不采用网卡命名规则而是采用原RHEL6的命名规则

实验临时修改IP:

ifconfig eno16777736 100.100.100.100/16

ifconfig

nmcli connection down eno16777736;nmcli connection up eno16777736

ifconfig

实验-修改网络参数官方推荐版：

nmcli connection modify eno167..   ipv4.method manual ipv4.addresses "192.168.100.1/24 192.168.100.1"  ipv4.dns 192.168.100.1 connection.autoconnect yes

nmcli connection modify eno167..   +ipv4.addresses 10.0.0.1/8

nmcli connection down eno1677..  ;nmcli connection up  eno1677..

实验添加IPV6的地址：

nmcli connection modify eno167..   ipv6.method manual ipv6.addresses  '2001：：1/64  2001::1 '  ipv6.dns 2001：：1

nmcli connection down eno1677..  ;nmcli connection up  eno1677..

ping6 2001::1

实验-多配置文件管理网卡：

nmcli connection add type ethernet con-name home ifname eno 1677..

nmcli connection  modify home ipv4.method manual ipv4.addresses "10.0.0.1/24 10.0.0.1" ipv4.dns 10.0.0.1

nmcli connection down eno1677..

nmcli connection   up   home

查看地址已经更改

实验-单配置文件增加：：信息

vim /etc/sysconfig/network-scripts/ifcfg-eno16...

IPADDR1=10.0.0.1

PREFIX1=8

GATEWAY1=10.0.0.1

DNS2=10.0.0.1

systemctl restart NetworkManager

ip addr show

实验-新增网卡

新添加一块网卡

nmcli device show 可以发现新增了一块网卡

nmcli connection add type ethernet en0.... ifname eno....

nmcli connection modify en0.... ipv4.method manual ipv4.addresses "192.168.100.1/24 192.168.100.1" ipv4.dns 192.168.100.1 connection.autoconnect yes

systemctl restart NetworkManager

ifconfig