[ns] how to assign level number?

[penni afni]

Hye all,
   
  I would like to know how to assign a level number for nodes in hierarchical 
structure?
   
  For example, root node assign itself a level 0 and broadcast a packet. When 
the neighbours receive this packet, they assign themselves level 1.
   
   Can you help me.
   
  Thank you.

       
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