Symptoms

Attempting to create a new bridged network interface (VLAN) using Virtuozzo Automator Tool (web panel) fails with "Failed to update the virtual network information."

cannot_create_vlan

Cause

Interface names can be up to 15 characters long

Resolution

Prerequisites:

Ensure that the user executing these commands has the necessary permissions to perform the operations (preferably use the root user in the CLI)

Procedure:

1) Confirm the network interface name of the desired network device.

# ip link show

2) Now down the network interface chosen, then change its name and turn the interface up again.

# ip link set <long-interface-name> down 
# ip link set <long-interface-name> name <new-interface-name> 
# ip link set <new-interface-name> up

3) Lastly, create the bridge interface (VLAN) desired and turn it up.

# nmcli con add type vlan con-name <vlan-name> dev <new-interface-name> id <vlan-id>
# nmcli con up <vlan-name>

Additional information

Interface names and VLAN names usually accept alphanumeric characters and some special characters such as hyphens (-) or underscores (_). However, it is generally recommended to stick to only alphanumeric characters and avoid using spaces or special characters that may cause issues in certain configurations.

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