Re: DSDV in ns-2.1b5

[Youngbae - Ko <youngbae@cs.tamu.edu>]

On Thu, 8 Jul 1999, Satish Kumar wrote:

> 
> You might want to check if the AgentTrace, RouterTrace or MacTrace Tcl 
> variables are set to ON in the wireless.tcl example file.

Thanks, Satish
But, I had set to ON for all Traces in the wireless.tcl file. 
Therefore, I don't think that is the reason for my problem.

One thing I suspect is that a routing table would have wrong information.
I tried to make a printout elements of a routing table and 
I found that some garbage values were stored in the routing table. 
For example, a next hop field (rte.hop) is set by 255.

Have you looked at the 'dsdv.cc' file?  
In the 'makeUpdate()' function on that file, there is a statement:

          :
  rte.dst = myaddr_;
  rte.hop = iph->src_;    <--- Is this correct ?? 
  rte.metric = 0;              (It is 255 initially and seems to be      
          :                     increased by 256 - (into 511, 767...)
 

- Youngbae



> > Hello.
> > 
> > I need some help from whoever have tested on dsdv routing 
> > implementation (CMU's extensions) in the current version of ns-2.
> > 
> > I have tried to execute ns-2 for cbr traffics with a DSDV 
> > routing agent ( tcl/mobility/dsdv.tcl and dsdv/dsdv.cc files ). 
> > I have used my own scenario and connection files.
> > I really suspect that this DSDV version works properly.
> > 
> > 1) Nothing is in a output trace file (out.tr), except for movement 
> >    of nodes (M). Looks no data packets go through the network.
> > 
> > 2) some bugs at functions to handle routing table update ??
> > 
> > It is surprising if the DSDV does not work because CMU folks
> > reported a simulation result using DSDV routing agent in their paper.
> > Anyone who have experienced similar problems with dsdv, 
> > please answer for me. 
> > 
> > regards,
> > - Youngbae
> > 
> > /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
> >      Young-Bae Ko    {youngbae@cs.tamu.edu}
> > 
> >      http://www.cs.tamu.edu/people/youngbae
> >      Dept. of Computer Science   [Tel] 409-845-5007 
> >      Texas A&M University        [Fax] 409-847-8578
> > /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
> > 
> 
> 
> 


/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
     Young-Bae Ko    {youngbae@cs.tamu.edu}

     http://www.cs.tamu.edu/people/youngbae
     Dept. of Computer Science   [Tel] 409-845-5007 
     Texas A&M University        [Fax] 409-847-8578
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */