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Networking
==========
barebox has IPv4 networking support. Several protocols such as
:ref:`command_dhcp`, :ref:`filesystems_nfs`, :ref:`command_tftp` are
supported.
Network configuration
---------------------
The first step for networking is configuring the network device. The network
device is usually ``eth0``. The current configuration can be viewed with the
:ref:`command_devinfo` command:
.. code-block:: sh
barebox:/ devinfo eth0
Parameters:
ipaddr: 192.168.23.197
serverip: 192.168.23.1
gateway: 192.168.23.1
netmask: 255.255.0.0
ethaddr: 00:1c:49:01:03:4b
The configuration can be changed on the command line with:
.. code-block:: sh
eth0.ipaddr=172.0.0.10
The :ref:`command_dhcp` command will change the settings based on the answer
from the DHCP server.
This low-level configuration of the network interface is often not necessary. Normally
the network settings should be edited in ``/env/network/eth0``, then the network interface
can be brought up using the :ref:`command_ifup` command.
Network filesystems
-------------------
barebox supports NFS and TFTP as filesystem implementations. See :ref:`filesystems_nfs`
and :ref:`filesystems_tftp` for more information. After the network device has been
brought up a network filesystem can be mounted with:
.. code-block:: sh
mount -t tftp 192.168.2.1 /mnt
or
.. code-block:: sh
mount -t nfs 192.168.2.1:/export none /mnt
**NOTE:** this can often be hidden behind the :ref:`command_automount` command to make
mounting transparent to the user.
Network console
---------------
barebox has a UDP-based network console. If enabled in the config, you will see
something like this during startup::
registered netconsole as cs1
By default the network console is disabled during runtime to prevent security
risks. It can be enabled using:
.. code-block:: sh
cs1.ip=192.168.23.2
cs1.active=ioe
This will send UDP packets to 192.168.23.2 on port 6666. On 192.168.23.2 the
scripts/netconsole script can be used to control barebox:
.. code-block:: sh
scripts/netconsole <board IP> 6666
The netconsole can be used just like any other console.
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