Howto NetworkManager

install NetworkManager

make sure you have network-manager installed:

yum install networkmanager -y

start and enable NetworkManager:

systemctl enable NetworkManager && systemctl start NetworkManager

add address to ethernet

add ip address to your eth0 interface:

nmcli con add con-name eth0 ipv4.method manual type ethernet ifname eth0 ipv4.address 192.168.75.15/24 ipv4.gateway 192.168.75.1 ipv4.dns 4.2.2.1,4.2.2.2 autoconnect yes

enable network interface eth0:

nmcli connection up eth0

configure dhcp to your eth0 interface:

nmcli con add con-name eth0 ipv4.method auto type ethernet ifname eth0 autoconnect yes

NetworkManager commands

show connections using nmcli

nmcli con show

show active connections using nmcli

nmcli con show --active

show more details about connection device

nmcli con show "System eth0"

delete connection device:

nmcli con del "System eth0"

bring up new profile using nmcli

nmcli con up static

reload configuration using nmcli

nmcli con reload
nmcli con up static

modify ip address using nmcli

nmcli con modify "static" ipv4.addresses "172.25.0.10/24 172.25.0.254"

add another ip address to interface using nmcli

nmcli con modify "static" +ipv4.addresses "172.25.0.15/24"

modify dns using nmcli

nmcli con modify "static" ipv4.dns 8.8.8.8

create bridge interface

create the bridge interface:

nmcli connection add type bridge autoconnect yes con-name br0 ifname br0

add ip address to bridge interface:

nmcli connection modify br0 ipv4.addresses 192.168.75.15 ipv4.method manual ipv4.gateway 192.168.75.1 ipv4.dns 4.2.2.1,4.2.2.2

add device to bridge:

nmcli connection add type bridge-slave autoconnect yes con-name br0-eth0 ifname eth0 master br0

active bridge interface:

nmcli connection up br0

network teaming

add team interface:

nmcli connection add type team con-name team0 ifname team0 config '{"runner": {"name": "activebackup"}}'

add ipv4 address to interface:

nmcli connection modify team0 ipv4.addresses 172.25.0.11

add ipv4 method:

nmcli connection modify team0 ipv4.method manual

add slave interface:

nmcli connection add type team-slave con-name team0-eth1 ifname eth1 master team0

add ports to interface:

nmcli connection add type team-slave ifname eth0 master team0
nmcli connection add type team-slave ifname eth1 master team0

enable interfaces:

nmcli device enable eth0
nmcli device enable eth1

disable other connections and enable team0:

nmcli connection down System eth0
nmcli connection up team0

test connection disabling one interface:

nmcli device disable eth0

modify configuration:

nmcli connection modify team0 team.config '{"runner": {"name": "activebackup"}}'