1.. zephyr:code-sample:: ipv4-autoconf
2   :name: IPv4 autoconf client
3   :relevant-api: networking net_if net_context net_mgmt
4
5   Perform IPv4 autoconfiguration and self-assign a random IPv4 address
6
7Overview
8********
9
10This sample application starts a IPv4 autoconf and self-assigns
11a random IPv4 address in the 169.254.0.0/16 range, it defends
12the IPv4 address and resolves IPv4 conflicts if multiple
13parties try to allocate an identical address.
14
15Requirements
16************
17
18- :ref:`networking_with_host`
19
20Building and Running
21********************
22
23These are instructions for how to use this sample application running
24on a :zephyr:board:`frdm_k64f` board to configure a link local IPv4 address and
25connect to a Linux host.
26
27Connect ethernet cable from a :zephyr:board:`Freedom-K64F board <frdm_k64f>` to a Linux
28host machine and check for new interfaces.
29
30Running Avahi client in Linux Host
31==================================
32
33Assign a IPv4 link local address to the interface in the Linux system
34
35.. code-block:: console
36
37   $ avahi-autoipd --force-bind -D eth0
38
39
40FRDM_K64F
41=========
42
43Build Zephyr the ``samples/net/ipv4_autoconf`` application using these
44steps:
45
46.. zephyr-app-commands::
47   :zephyr-app: samples/net/ipv4_autoconf
48   :host-os: unix
49   :board: frdm_k64f
50   :goals: build flash
51   :compact:
52
53Once IPv4 LL has completed probing and announcement, details are shown like this:
54
55.. code-block:: console
56
57   $ sudo screen /dev/ttyACM0 115200
58
59.. code-block:: console
60
61   [ipv4ll] [INF] main: Run ipv4 autoconf client
62   [ipv4ll] [INF] handler: Your address: 169.254.218.128
63
64Note that the IP address may change at each self assignment.
65
66To verify the Zephyr application is running and has configured an IP address
67type:
68
69.. code-block:: console
70
71   $ ping -I eth1 169.254.218.128
72
73Wi-Fi
74=====
75
76The IPv4 Wi-Fi support can be enabled in the sample with
77:ref:`Wi-Fi snippet <snippet-wifi-ipv4>`.
78