Перезапустите сеть на RHEL8/CentOs8 через ssh с помощью nmcli, проверив, что операция завершена

После обновления конфигурации сети необходимо использовать следующую команду:

nmcli connection reload

nmcli manpages:

   reload
       Reload all connection files from disk. NetworkManager does not monitor changes to connection files by default. So you need to use
       this command in order to tell NetworkManager to re-read the connection profiles from disk when a change was made to them.
       However, the auto-loading feature can be enabled and then NetworkManager will reload connection files any time they change
       (monitor-connection-files=true in NetworkManager.conf(5)).