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From: Marek Lindner <lindner_marek@yahoo.de>
Date: Mon, 9 Jan 2012 20:22:37 +0800
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Subject: Re: [B.A.T.M.A.N.] problem with mesh network
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To: The list for a Better Approach To Mobile Ad-hoc Networking <b.a.t.m.a.n@lists.open-mesh.org>


Hi,

> We are using batman-adv 2011.2.0 with Openwrt Backfire-rc6 on D-Link
> Dir-615 routers (2 Antennas, 1 single radio), each router with an adhoc
> interface managed by batman-adv for the mesh network and an Acces Point
> interface bridged with bat0 and ethernet to allow non batman-adv clients
> to connect. The problem is that sometimes all works fine, but sometimes
> we get very poor bitrates between routers, even using just two routers,
> testing with iperf. We don't know where the problem is, specially
> because it's a very erratic behavior. If any of you have used this
> configuration with openwrt and ath9k driver we'd really appreciate some
> help.

this does not sound like a batman issue. Did you try contacting the 
ath9k/linux-wireless/openwrt developers ?


> By the way, the D-Link Dir-615 is an n router, but for some reason
> related with hostapd the ap vif gets configured in g mode, and the adhoc
> in n mode, no matter what we set in the uci files. So in case the
> problem were related with the adhoc and ap virtual interface, we were
> thinking about the possibility of setting the mesh network without using
> adhoc mode. In that case each router should have one ap for non
> batman-adv clients, and two additional interfaces, one in ap and the
> other managed, these two used to connect with other routers via
> batman-adv, would that be correct? In that case, you think this
> configuration could be more or less stable than the other using adhoc
> mode? 

batman-adv does not care how you configure your interfaces. Using managed/AP 
with batman-adv on top works as well. However, you will need to configure each 
managed/AP setup manually which will be cumbersome in a larger network and has 
no failover. A single failure in your managed/AP chain will bring down all 
nodes depending on it.

Cheers,
Marek