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Getting started with the batman daemon

Make sure you have no firewall running that is blocking UDP
port 4305 (originator messages), port 4306 (gateway traffic).
Port 4307 has to be open for incoming UDP traffic if you run the
B.A.T.M.A.N. visualization server.

First the network interfaces supposed to participate
in the batman mesh must be configured properly. You either run it on top
of any "normal" network interface (WiFi, Ethernet, etc) or on an alias
interface. In normal scenarios the alias interface is not needed unless
you want to test / verify / benchmark B.A.T.M.A.N.

Alias interface example: Assuming you have an already configured
interface eth1 with the IP address of and want to run
batman in parallel on the same physical interface but with a IP/netmask.

$ ifconfig eth1:bat netmask broadcast
$ batmand -d 3 eth1:bat

This will configure an alias interface on top of eth1 named eth1:bat and start
the batman daemon with debug level 3 on that alias interface. As soon as
another running batmand (with the same netmask and broadcast address) is
connected to that link (or within the range of the wireless link)
both batman daemons should see each other and indicate this in the debug output.

The daemon started with debug level 3 can be terminated with ctrl-c.
If no debuglevel is given at startup, using

$ batmand eth1:bat

the daemon will immediateley fork to the background (as is the usual behavior
of a daemon). However you can always connect to the main daemon (running
in background) by launching a client-batmand process with the
-c and -d <number> option, where the number represents the desired
debug-level. The following command will connect to a running batmand
process providing debug-level 1 informations.

$ batmand -c -d 1 # shows a list of other nodes in the mesh

$ batmand -c -d 2 # shows a list of nodes offering internet GW access

$ route -n # shows your current routing table as modified by batmand

For a full list of supported debug-levels and other startup options see

$ batmand -h # providing a brief summary of options and

$ batmand -H # for a more detailed list of options

Use ctrl-c to terminate a process running in foreground and

$ killall batmand

to terminate the main batmand daemon running in background.

If you want to use one of the batman-internet gateways showed with
debug-level 2 launch the main batmand using:

$ batmand -r 3 eth1:bat # to automatically select a reasonable GW

$ batmand -r 3 -p <ip-of-batmand-gw-node> eth1:bat # to set a preferred GW

In case of success this will setup a tunnel to a (preferred) batman-gw-node
and configure the routing table that all packets matching the default route
are forwarded (tunneled) respectively.
More information is available using the -h and -H options and in the manpage.

Happy routing!

The B.A.T.M.A.N. contributors

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