Re: [ns] Cannot assign cost to links(Thanks!!)

[Ann Monico <packetdata@yahoo.com>]

Haobo creating the simplex-link first helped! Thanks.
All:
I was also wondering if there is a way to reverse the
link direction at some point after it is created. The
algorithm I'm trying to implement needs to flip the
direction of some links. Setting negative cost however
doesn't seem to have any effect.

thanks
-ann


--- Haobo Yu <haoboy@packetdesign.com> wrote:
> $ns simplex-link does not return a handle to the
> link. :( 
> 
> Either create a simplex link first, then use [$ns
> link $n0 $n1] cost -10
> (there might be a handy one let you do sth like $ns
> cost $n0 $n1 -10...)
> 
> Or go to your tcl/lib/ns-lib.tcl, find simplex-link,
> and put at its last
> line 'return $link_($sid:$did)'
> 
> On Fri, 6 Oct 2000, Ann Monico wrote:
> 
> > Hi
> > 
> > I'm having problem in assigning link cost for the
> > links.Say for a simple
> > case of 3 nodes 0,1 and 2 I'm doing the following
> > 
> > set link1 [$ns simplex-link $n0 $n2 1Mb 10ms
> DropTail]
> > $link1 cost -10
> > set link2 [$ns simplex-link $n0 $n1 1Mb 10ms
> DropTail]
> > $link2 cost -10
> > 
> > While it works for the 1st link, for any
> subsequent
> > links it gives the
> > following problem:
> > 
> > invalid command name "_o24 _o34"
> >     while executing
> > "$link2 cost -10 " 
> > 
> > 
> > This command name "_o24 _o34" concatenates as more
> > link objects are added.
> > 
> > I'm very badly stuck, any help is appreciated. 
> > 
> > -ann       
> > 
> > 
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> 


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