Re: [B.A.T.M.A.N.] Batman an more than one Gateway

[Marek Lindner <mareklindner@neomailbox.ch>]

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Hi,

> I have take a look to the configuration of our gateways.
> Inho there are some points which are not OK,
> Broadcasts are rebroadecasted on a wired connection,

please note that batman's payload reboradcast behavior is unrelated to the 
batman gateway feature. The effect of the batman gateway feature is explained 
here: https://www.open-mesh.org/projects/batman-adv/wiki/Gateways

Rebroadcast on an interface depends on the interface type. Generally, batman 
runs on 3 different types of interfaces:

 * WiFi: payload broadcasts are transmitted 3 times to increase the chances of 
a successful transmission
 * VPN / wired Ethernet: payload broadcast is transmitted once as most sane 
VPNs don't experience packet loss

Guessing from your interface names you are running VPNs and not wired 
Ethernet, is that correct ?


> this seem for me to be an issue.

What exactly is the issue ? 


>       Gateway      (#/255)           Nexthop [outgoingIF]: advertised uplink
> bandwidth ... [B.A.T.M.A.N. adv 2014.3.0, MainIF/MAC:
> ftun-q1/12:e8:ef:7f:0d:c8 (bat0)] ca:b1:f2:63:f3:cf (251) ca:b1:f2:63:f3:cf
> [   ftun-q1]: 50.0/50.0 MBit
> 
> [B.A.T.M.A.N. adv 2016.4, MainIF/MAC: mesh0/92:fb:53:11:44:f1
> (bat0/90:f6:52:11:44:f1 BATMAN_IV)] IF             Neighbor             
> last-seen
>      mesh-vpn	  aa:ff:ca:ca:fe:03    3.342s

It is recommended to run the same batman version on all nodes to avoid 
unexpected behavior. These 2 versions are separated by 2 years of development.


Cheers,
Marek

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