When VXLAN networks are created, each network is assigned a unique segmentation ID that is used to encapsulate traffic. When the Linux bridge Mechanism driver is used, the segmentation ID is used when creating the respective VXLAN interface on each host.

The vni_ranges configuration option is a comma-separated list of ID ranges that are available for project network allocation when tunnel_type is set to vxlan.

In the following example, segmentation IDs 1 through 1000 are reserved for allocation to tenant networks upon creation:

vni_ranges = 1:1000 

The vni_ranges option supports non-contiguous IDs using a comma-separated list as follows:

vni_ranges = 1:1000,2000:2500 

Update the ML2 configuration file on the controller01 node and add the following vni_ranges to the [ml2_type_vxlan] section:

[ml2_type_vxlan]
...
vni_ranges = 1:1000