Re: [B.A.T.M.A.N.] Fail to create tunnels using br-lan

["Javier Simó" <javier.simo@urjc.es>]

Hello Sven

Thanks for your answer, I collaborate with Andrei, who asked the 
question, let me try to help to explain, though I suspect that your 
message did contain the answer somehow.

We know that batman-adv does multi-hop at L2. That is in fact the 
problem. We are trying to test how a network utility called simplemux 
may improve the performance in a mesh network using batman-adv. The idea 
behind simplemux is that aggregating all packets that node X wants to 
sent to node Y at any time, making them share the IP header and 
accessing the channel only once for the bundle, can dramatically improve 
the performance. Node X should take any packets in the TX  queue coming 
from different sources and probably going to different destinations but 
having the same next hop, and put them together in a bundle. That is 
what simplemux does. But actually simplemux operates on a tunnel that 
takes the packets sent through a physical interface in X and drives them 
to a physical interface of Y.

We don't know well how the tunnel manages the traffic, but possibly the 
problem is that it requires the packages coming up from the physical 
interface to the IP layer (what does not happen in batman-adv), which is 
actually what you say. In this case, may be we cannot do what we wanted 
to do :-(

Thanks a lot

Javier

El 13/01/17 a las 08:31, Sven Eckelmann escribió:
> On Donnerstag, 12. Januar 2017 20:27:34 CET Andrei Buciulea wrote:
> [...]
>> *> The tunnels can be successfully created in OpenWRT*I have created the
>> tunnel and assigning the mesh devices an IP(192.168.100.5):
>> The other one mesh device IP is: 192.168.100.4
>>
>>        tun0      Link encap:UNSPEC  HWaddr
>> 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
>>                   inet addr:192.168.100.5  P-t-P:192.168.100.5
>> Mask:255.255.255.0
>>                   UP POINTOPOINT NOARP MULTICAST  MTU:1500  Metric:1
> [...]
>> If anyone has any idea why it does not work I would be very grateful.
> Sorry, but I still don't get what are you doing with layer 3 tunnel stuff and
> what batman-adv has to do with it (it is a layer 2 based protocol which
> requires layer 2 interfaces).
>
> Kind regards,
> 	Sven

-- 

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Fco. Javier Simó Reigadas <javier.simo@urjc.es>
Subdirector de Ord. Docente
ETS de Ingeniería de Telecomunicación
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