[ns] route to BS not known in shadowing model

[gmc50 <gmc50@student.canterbury.ac.nz>]

Hi ns users,

I am trying to do some simulations using the shadowing propagation model
and Mobile IP in ns-2.1b7.

I am using the DSDV routing agent and my mobile is always stopped next
to the BS. I keep getting the message "warning: Route to base_stn not
known: dropping pkt" very often throughout my simulation. This message
does not keep appearing if I use the Two-Ray Ground model.

Since the mobile is not moving and is always within the BS coverage
area, does anybody know why I sometimes get this message?

Thanks a lot,

Gustavo.