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- The network service with the network configuration based on ifcfg-files in /etc/sysconfig/network-scripts. This requires the network-scripts package.
- The NetworkManager with its own configuration file syntax. Persistent configuration files are stored in /etc/NetworkManager/system-connections. The NetworkManager has an a plugin (ifcfg-rh) to handle ifcfg-files. This plugin does not support all configuration options of the network-scripts system (e.g., tunnel and tap interfaces are not supported).
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- The network-scripts package is no longer available in the Linux package repositories.
- The default Networkmanager plugin configuration is keyfile, ifcfg-rh.
- Existing ifcfg-files can still be read and written, but only if supported by the ifcfg-rh plugin.
- A new nmcli command option (
nmcli connection migrate <con-name>) helps with the conversion of ifcfg - configuration files to native NetworkManager connection profiles. However, this command only works for connections supported by the ifcfg-rh plugin. This means, for example, that TAP interfaces that were previously configured via ifcfg-files must now be recreated using nmcli commands or another NetworkManager configuration tool. Before using the migration command, take a backup copy of the content of /etc/sysconfig/network-scripts. - By default, there is no ifup command. If it is needed, the NetworkManager variant of the command can be installed (NetworkManager-initscripts-updown).
- The loopback interface (lo) cannot be managed by the NetworkManager in versions before 9.2.
- Interfaces managed by the Charon-SSP Manager must be under NetworkManager control (managed interfaces).
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