Chapter 3. Configuring and managing network access

Procedure

1. From the Installation Summary window, click Network and Host Name.

2. From the list in the left-hand pane, select an interface. The details are displayed in the right-hand pane.

   Note

   • There are several types of network device naming standards used to identify network devices with persistent names, for example, em1 and wl3sp0. For information about these standards, see the Configuring and managing networking document.

3. Toggle the ON/OFF switch to enable or disable the selected interface.

   Note

   The installation program automatically detects locally accessible interfaces, and you cannot add or remove them manually.

4. Click + to add a virtual network interface, which can be either: Team (deprecated), Bond, Bridge, or VLAN.
5. Click - to remove a virtual interface.
6. Click Configure to change settings such as IP addresses, DNS servers, or routing configuration for an existing interface (both virtual and physical).

7. Type a host name for your system in the Host Name field.

   Note

   • The host name can either be a fully qualified domain name (FQDN) in the format hostname.domainname, or a short host name without the domain. Many networks have a Dynamic Host Configuration Protocol (DHCP) service that automatically supplies connected systems with a domain name. To allow the DHCP service to assign the domain name to this system, specify only the short host name.
   • When using static IP and host name configuration, it depends on the planned system use case whether to use a short name or FQDN. Red Hat Identity Management configures FQDN during provisioning but some 3rd party software products may require short name. In either case, to ensure availability of both forms in all situations, add an entry for the host in /etc/hosts` in the format IP FQDN short-alias.
   • The value localhost means that no specific static host name for the target system is configured, and the actual host name of the installed system is configured during the processing of the network configuration, for example, by NetworkManager using DHCP or DNS.
   • Host names can only contain alphanumeric characters and - or .. Host name should be equal to or less than 64 characters. Host names cannot start or end with - and .. To be compliant with DNS, each part of a FQDN should be equal to or less than 63 characters and the FQDN total length, including dots, should not exceed 255 characters.
8. Click Apply to apply the host name to the installer environment.
9. Alternatively, in the Network and Hostname window, you can choose the Wireless option. Click Select network in the right-hand pane to select your wifi connection, enter the password if required, and click Done.

Procedure

1. Add a new NetworkManager connection profile for the Ethernet connection:

   # nmcli connection add con-name Example-Connection ifname enp7s0 type ethernet

   The further steps modify the Example-Connection connection profile you created.

2. Set the IPv4 address:

   # nmcli connection modify Example-Connection ipv4.addresses 192.0.2.1/24

3. Set the IPv6 address:

   # nmcli connection modify Example-Connection ipv6.addresses 2001:db8:1::1/64

4. Set the IPv4 and IPv6 connection method to manual:

   # nmcli connection modify Example-Connection ipv4.method manual
   # nmcli connection modify Example-Connection ipv6.method manual

5. Set the IPv4 and IPv6 default gateways:

   # nmcli connection modify Example-Connection ipv4.gateway 192.0.2.254
   # nmcli connection modify Example-Connection ipv6.gateway 2001:db8:1::fffe

6. Set the IPv4 and IPv6 DNS server addresses:

   # nmcli connection modify Example-Connection ipv4.dns "192.0.2.200"
   # nmcli connection modify Example-Connection ipv6.dns "2001:db8:1::ffbb"

   To set multiple DNS servers, specify them space-separated and enclosed in quotes.

7. Set the DNS search domain for the IPv4 and IPv6 connection:

   # nmcli connection modify Example-Connection ipv4.dns-search example.com
   # nmcli connection modify Example-Connection ipv6.dns-search example.com

8. Activate the connection profile:

   # nmcli connection up Example-Connection
   Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/13)

Verification

1. Display the status of the devices and connections:

   # nmcli device status
   DEVICE      TYPE      STATE      CONNECTION
   enp7s0      ethernet  connected  Example-Connection

2. Use the ping utility to verify that this host can send packets to other hosts:

   # ping host_name_or_IP_address

Procedure

1. If you do not know the network device name you want to use in the connection, display the available devices:

   # nmcli device status
   DEVICE     TYPE      STATE                   CONNECTION
   enp7s0     ethernet  unavailable             --
   ...

2. Start nmtui:

   # nmtui

3. Select Edit a connection, and press Enter.
4. Press the Add button.
5. Select Ethernet from the list of network types, and press Enter.
6. Optional: Enter a name for the NetworkManager profile to be created.
7. Enter the network device name into the Device field.

8. Press the OK button to create and automatically activate the new connection.

   
9. Press the Back button to return to the main menu.
10. Select Quit, and press Enter to close the nmtui application.

Verification

1. Display the status of the devices and connections:

   # nmcli device status
   DEVICE      TYPE      STATE      CONNECTION
   enp7s0      ethernet  connected  Example-Connection

2. Use the ping utility to verify that this host can send packets to other hosts:

   # ping host_name_or_IP_address

Procedure

1. If you do not know the network device name you want to use in the connection, display the available devices:

   # nmcli device status
   DEVICE     TYPE      STATE                   CONNECTION
   enp7s0     ethernet  unavailable             --
   ...

2. Start nmtui:

   # nmtui

3. Select Edit a connection, and press Enter.
4. Press the Add button.
5. Select Ethernet from the list of network types, and press Enter.
6. Optional: Enter a name for the NetworkManager profile to be created.
7. Enter the network device name into the Device field.

8. Configure the IPv4 and IPv6 address settings in the IPv4 configuration and IPv6 configuration areas:

   1. Press the Automatic button, and select Manual from the displayed list.
   2. Press the Show button next to the protocol you want to configure to display additional fields.

   3. Press the Add button next to Addresses, and enter the IP address and the subnet mask in Classless Inter-Domain Routing (CIDR) format.

      If you do not specify a subnet mask, NetworkManager sets a /32 subnet mask for IPv4 addresses and /64 for IPv6 addresses.

   4. Enter the address of the default gateway.
   5. Press the Add button next to DNS servers, and enter the DNS server address.
   6. Press the Add button next to Search domains, and enter the DNS search domain.

   Figure 3.1. Example of an Ethernet connection with static IP address settings

   
9. Press the OK button to create and automatically activate the new connection.
10. Press the Back button to return to the main menu.
11. Select Quit, and press Enter to close the nmtui application.

Verification

1. Display the status of the devices and connections:

   # nmcli device status
   DEVICE      TYPE      STATE      CONNECTION
   enp7s0      ethernet  connected  Example-Connection

2. Use the ping utility to verify that this host can send packets to other hosts:

   # ping host_name_or_IP_address