link failure problem.

["Bu, Tian" <tbu@cs.umass.edu>]

Hi, friends.

Suppose there are several nodes connect together in this way.


     ---|1|---|0|-------
         |     |
         -----|2| 

After the excution of   "$ns rtmodel-at 3.0 down $n0 $n1"
When I want to get the nexthop from n1 to n0 by
call "$ns upstream-node $n1 $n0", it still return the n0.
why it not return n2 ? how can I get the return value as n2?


Thanks



:-)
Tian B.