IPv4 autoconf client

Overview

This sample application starts a IPv4 autoconf and self-assigns a random IPv4 address in the 169.254.0.0/16 range, it defends the IPv4 address and resolves IPv4 conflicts if multiple parties try to allocate an identical address.

Requirements

Networking with the host system

Building and Running

These are instructions for how to use this sample application running on a FRDM-K64F board to configure a link local IPv4 address and connect to a Linux host.

Connect ethernet cable from a Freedom-K64F board to a Linux host machine and check for new interfaces.

Running Avahi client in Linux Host

Assign a IPv4 link local address to the interface in the Linux system

$ avahi-autoipd --force-bind -D eth0

FRDM_K64F

Build Zephyr the samples/net/ipv4_autoconf application using these steps:

west build -b frdm_k64f samples/net/ipv4_autoconf
west flash

Once IPv4 LL has completed probing and announcement, details are shown like this:

$ sudo screen /dev/ttyACM0 115200

[ipv4ll] [INF] main: Run ipv4 autoconf client
[ipv4ll] [INF] handler: Your address: 169.254.218.128

Note that the IP address may change at each self assignment.

To verify the Zephyr application is running and has configured an IP address type:

$ ping -I eth1 169.254.218.128

Wi-Fi

The IPv4 Wi-Fi support can be enabled in the sample with Wi-Fi snippet.