[Olsr-users] Multi-hop OLSR

Song Gao (spam-protected)
Thu Oct 11 22:28:25 CEST 2012

It's possible to use block certain node at link layer by using
iptables with --mac option. Check this page out:

By blocking certain nodes from one node based on mac address, OLSRd
control messages are also blocked, as a result, OLSRd would consider
the blocked nodes not reachable, and build multi-hop routing tables.

Kind regards,
Song Gao

On Thu, Oct 11, 2012 at 3:09 PM, Ben West <(spam-protected)> wrote:
> How are the laptops actually building the connections w/ each other?  I.e.
> over their wifi adapters, or over a wired LAN?
> Also, how are you ensuring the route N1 -> N2 -> N3?  If the laptops are
> meshing wirelessly, it may be difficult to ensure OLSR actually choses your
> desired route, due to transient fluctuations in wifi signal quality.
> If you are not already doing so, I would recommend using the LinkQualityMult
> parameter on each node specify negative biases for the node(s) you do not
> want to be that node's next hop.
> On Thu, Oct 11, 2012 at 9:36 PM, Ricardo T. Macedo <(spam-protected)>
> wrote:
>> Hello,
>> I've been working with OLSR protocol and I want to reproduce a scenario
>> with multi-hops. I'm using iperf to generate traffic data packet in the
>> network.
>> In my tests, I'm using three notebooks with backtrack linux (backtrack 5
>> R2). Every notebook (nodes), I labeled by N1, N2 or N3. N1 can communicate
>> with N3 only through N2, in multiple hop way. Every node is running OLSR
>> protocol. I try to run the iperf as a server in N1 ($ iperf -u -s -p 5000).
>> In N3, I run the iperf as a client ($ iperf -u -c <IP_address_N1> -p 5000).
>> In the node N3, I just run the OLSR protocol. In a single hop, I have no
>> problem, but in multi-hop it doesn't work. OLSR is finding the multi-hop
>> correctly, but when I try to send the data packet I get the "WARNING: did
>> not receive ack of last datagram after 10 tries" error.
>> Does anyone have any idea about what could be wrong?
>> Thanks,
>> Ricardo
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> Ben West
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