Re: [B.A.T.M.A.N.] Problems with Gateway-Selection without option -g

[Michael Rack <michael.rack@rsm-freilassing.de>]

Hi Elektra,

thanks for your trick. This trick works for me, but it is a bad solution 
:-) I switched back to OLSR, although i like the concept of BATMAN more 
then that of OLSR.

Announcing 0.0.0.0/0 can really be a problem, but why does BATMAN tunnel 
the internet-traffic through gate0?

It will be nice, if there will be a option in the next release, where 
users can decide to use routing or tunneling internet-traffic.

Cheers,
Michael.

Am 06.09.2009 12:50, schrieb elektra:
> Hello Michael!
>
> Batmand checks and deliberately blocks users from announcing 0.0.0.0/0 - this
> could cause the notorious black-hole problem we have experienced in the old
> days when using OLSR. Also we think it is important that we can explicitly
> tell a Batman node to use Internet gateway functionality or not.
>
> Default routes in a mesh can be really annoying and break network
> functionality. If you only have one default gateway in your Batmand network
> and really know what you are doing you can actually override this check with a
> simple trick.
>
> As a workaround you can announce two subnetworks 0.0.0.0/1 and 128.0.0.0/1
> instead of 0.0.0.0/0.
>
> batmand -a 0.0.0.0/1,128.0.0.0/1<your interface>
>
> Cheers,
> Elektra
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