Using the NMCLI command to create a network group on Linux

Network group: is a method of aggregating multiple network cards together to achieve redundancy and increase throughput

Network group differs from legacy bonding technology for better performance and scalability

The network group is implemented by the kernel driver and teamd daemon.

Below we demonstrate how to create a network group with the NMCLI command on a Linux system using the CENTOS7 system as an environment

NMCLI connection Add con-name team0 type team ifname team0 config ' {"runner": {"name": "Activebackup"}} '

Create a IFCFG-TEAM0 configuration file

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NMCLI Connection Modify TEAM0 ipv4.addresses 10.1.56.56/16

Add IP for TEAM0

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Modify the Bootproto=none in the IFCFG-TEAM0 configuration file

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NMCLI connection Add con-name team-port1 type Team-slave ifname eno33554984 master Team0

NMCLI connection Add con-name team-port2 type Team-slave ifname eno50332208 master Team0

Creating Port1 and Prot2 interfaces

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View Port1 and Port2 profiles

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nmcli Connection up team0 enable TEAM0 and view

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nmcli Connection up Team-port1 enable Port1 interface

nmcli Connection up Team-port2 enable Port2 interface

and view

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Teamdctl Team0 State to view details of TEAM0 and enable NIC condition

Discover Port1 's eno33554984 in runner state

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Ifconfig View network card, find eno33554984 and eno50332208 no IP address

And Team0 has an IP address, which means our configuration is correct, eno33554984 and eno50332208 serve Team0

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Simulates a corrupted port1 and finds that the network is back to normal after a certain number of packets have been lost

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Teamdctl Team0 State to view details of TEAM0 and enable NIC condition

found that the previous port1 is already in the down state, Port2 's eno50332208 is in runner state

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Simulate Port1 and port2 all damage

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Network returns to normal once a certain number of packets have been lost

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This is because in our previous IP configuration, the default setting for global is available globally, so when the TEAM0 Network group of the two interfaces are all damaged, the system's other network card eno16777736 automatically take over the work of networks, thus realizing the redundancy mechanism.

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Using the NMCLI command to create a network group on Linux