This is the Logical Network Number (LNN) for the Vns component.
The LNN is used to identify the logical network that the Vns
component supports. Vns components, on different interconnected
nodes, provisioned with the same LNN are part of the same logical
network.
The maximum number of logical networks that can be supported in
the entire network is 2047. The maximum number of logical
networks, and Vns components, supported on a single node is 126.
Each Vns component must be provisioned with a unique LNN on a
single node.