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[ns] Link failure example, network dynamics chapter, Marc Greis' tutorial



Hi, 

The link failure example in the network dynamics chapter of Marc Greis'
tutorial doesn't seem to work. To be precise, after I add the '$ns rtproto
DV' line to the script and run the simulation, I find that no data packets
are generated and sent from node $n(0) at time 0.5 seconds. The rtProtoDV
packets can been seen and hte link failure occurs at the appointed time (1
second), but there are no data packets generated in the simulation! If the
line '$ns rtproto DV' is removed, then data packets ARE generated, but 
then one cannot view the routing protocol in action performing route 
repair.

My script seems identical to Marc's script (example3.tcl).

Could anyone please help me? 

Thanks and regards,
Samarth.