NE Type selection
FOXMAN-UN supports the following basic E-Tree node types:
Root 
:
: − Cannot have parents.
− The user can select child nodes which can be Hub or Leaf.
Leaf 
:
:− Can have parents Root or Hub.
− Cannot have child nodes.
− Multiple parents can be added to a PE-Dual home group.
Hub 
:
:− Can have parents Root or other Hub.
− The user can select child nodes which can be other Hub or Leaf.
− Multiple parents can be added to a PE-Dual home group.