[OLSR-users] Network stability

[aaron]

hi John!

Does the net have lots of traffic?
We experienced that when somebody is really sucking large scale GBytes 
from a close by server then the OLSR packets themselves can't get thru anymore 
sometimes. That we he loses his own route because he was downloading
to many movies.
-> "OLSR packet starvation"

Could that be the problem you are experiencing?

On Thu, Apr 28, 2005 at 12:15:56PM -0500, John Gorkos wrote:
> On Thursday 28 April 2005 11:58, Thomas Lopatic wrote:
> > Hey John.
> >
> > Hmmm. So the user's link to the tower times out on a regular basis which
> > then causes the indirect route via another user's node to be taken to
> > the tower?
> I think.  It happens so fast, that I can catch it in the act.  The debug dump 
> from the routers scrolls faster than I can catch it.
> 
> >
> > If so, you might want to increase the HelloValidityTime and the
> > TcValidityTime to, say, twice or three times their original values in
> > order to not use the link.
> HelloValidityTime       20.0
> TcValidityTime          40.0
> 
> >
> > You should then also change HystScaling to something smooth, e.g. 0.1,
> > which will make hysteresis less sensitive to changes in the link
> > quality. Moreover, you could lower HystThrHigh to something like 0.6 and
> > HystThrLow to something like 0.2, the effect being that the link is more
> > easily accepted as established by hysteresis (hysteresis value higher
> > than HystThrHigh) and less prone to being rated as broken (hysteresis
> > value lower than HystThrLow).
> HystScaling     1.00
> HystThrHigh     0.60
> HystThrLow      0.20
> 
> >
> > (You're still not using link quality, right?)
> No.  I'm torn over this one.  I want to, but I also don't want to deviate from 
> the RFC, and I don't want to risk stranding a router when I change over.
> >
> > -Thomas
> 
> Thanks, as always.  I'll go run these tests and let you know how it looks.  
> How far through the network should I propagate these?  Every affected router?
> 
> John Gorkos
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