[OLSR-users] a little feedback and questions
Mon Jul 12 01:43:50 CEST 2004
hi Andreas, hi lists!
(decoy: basically this sums up my questions from before)
=== contents ===
1) stupid hw / layer 2 / layer 3 (?) question
2) scalability model of olsr available?
---- snip ----
so, in vienna we managed to bring a few nodes(rooftop boxes) to olsr-land.
if everything goes ok this will be a permanent setup with hopefully many
new nodes joining. quite some pressure to make this work big over here.
So, we will connect new nodes over the time and you can see a little bit
of the setup at http://funke.lo-res.org -> click on Topologie
So far it seems to be ok except for two nodes (1 * linksys wrt54g and 1 *
debian and orinoco gold with pci - pcmcia adapter as far as i remember).
the setup is like this:
la17 --> oag18 ---------> vivi --------> fiber backbone
client olsr + bridge olsr + router
ignore the names (la17, oag18, ...) just nodes.
la17 is the pc with orinoco, oag18 is linksys, vivi is a linksys
what happens is that regularly whenever la17 sends out some bigger
requests or receives something bigger than the 64 byte ping packet, the
connection drops down to a few kB/s. With normal ping packets we would
have theoretially a thruput of 2-11mbit (signal quality is very good!
channel is set to 2 mbit).
any ideas where this could come from? any knobs where we could turn at
olsr or do you think we have a layer 2 problem?
anyway... en route to debugging this problem we started to discuss the
scalabilty issue of olsr :)
There seem to be two opinions here: 1) meshnetworking bandwidth will scale
with O(1/n) where n is the number of nodes and 2) meshnetworking bandwidth
will scale better than that :)
question: are there any mathematical models for olsr? would somebody be
interested in discussing models?
our model assumption here is that we connect meshnetworking boxes (olsr
boxes) with normal rod-style dipoles and where necessary (to bridge larger
distances) we use yagis.
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