https://devzone.nordicsemi.com/f/nordic-q-a/50448/nrf9160-mqtt-ipv6Hi, nRF9160 mqtt works with ipv4 by using &quot;ncs\nrf\samples\nrf9160\mqtt_simple&quot; application. Now NB-IOT network which we are using is faced out the IPv4 and moved to IPv6. Now nRF9160 is not connecting to mqtt server. By looking into &quot;ncs\nrf\samplesen-USTelligent Community 13Wed, 31 Jul 2019 12:27:51 GMThttps://devzone.nordicsemi.com/thread/201574?ContentTypeID=1Wed, 31 Jul 2019 12:27:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2f085209-1d23-4172-a190-c38458d566ebAndreasF<p>Great to hear, good luck! :-)</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/201527?ContentTypeID=1Wed, 31 Jul 2019 11:19:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4f7d07f7-200e-450d-b7e9-9e081b42f331Balamurugan<p>Thanks for quick reply.</p> <p>I will add IPv6 code and give a try.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/201521?ContentTypeID=1Wed, 31 Jul 2019 11:10:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:06e7e700-2093-4f0c-b6c2-37c81ad84ac3AndreasF<p>Hi.</p> <p>If you look at the example ncs\nrf\samples\nrf9160\aws_fota\src\main.c, you can see that both IPv4 and IPv6 is supported.</p> <p>(Line 243 - 255)</p> <div style="background-color:#1e1e1e;color:#d4d4d4;font-family:Consolas, &#39;Courier New&#39;, monospace;font-size:14px;font-weight:normal;line-height:19px;white-space:pre;"> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} </span><span style="color:#c586c0;">else</span><span style="color:#d4d4d4;"> </span><span style="color:#c586c0;">if</span><span style="color:#d4d4d4;"> (</span><span style="color:#9cdcfe;">addr</span><span style="color:#d4d4d4;">-&gt;</span><span style="color:#9cdcfe;">ai_addrlen</span><span style="color:#d4d4d4;"> </span><span style="color:#d4d4d4;">==</span><span style="color:#d4d4d4;"> </span><span style="color:#569cd6;">sizeof</span><span style="color:#d4d4d4;">(</span><span style="color:#569cd6;">struct</span><span style="color:#d4d4d4;"> sockaddr_in6)) {</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#6a9955;">/* IPv6 Address. */</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#569cd6;">struct</span><span style="color:#d4d4d4;"> sockaddr_in6 </span><span style="color:#d4d4d4;">*</span><span style="color:#d4d4d4;">broker </span><span style="color:#d4d4d4;">=</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;((</span><span style="color:#569cd6;">struct</span><span style="color:#d4d4d4;"> sockaddr_in6 </span><span style="color:#d4d4d4;">*</span><span style="color:#d4d4d4;">)</span><span style="color:#d4d4d4;">&amp;</span><span style="color:#d4d4d4;">broker_storage);</span></div> <br /> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#dcdcaa;">memcpy</span><span style="color:#d4d4d4;">(</span><span style="color:#9cdcfe;">broker</span><span style="color:#d4d4d4;">-&gt;</span><span style="color:#9cdcfe;">sin6_addr</span><span style="color:#d4d4d4;">.</span><span style="color:#9cdcfe;">s6_addr</span><span style="color:#d4d4d4;">,</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;((</span><span style="color:#569cd6;">struct</span><span style="color:#d4d4d4;"> sockaddr_in6 </span><span style="color:#d4d4d4;">*</span><span style="color:#d4d4d4;">)</span><span style="color:#9cdcfe;">addr</span><span style="color:#d4d4d4;">-&gt;</span><span style="color:#9cdcfe;">ai_addr</span><span style="color:#d4d4d4;">)</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#d4d4d4;">-&gt;</span><span style="color:#9cdcfe;">sin6_addr</span><span style="color:#d4d4d4;">.</span><span style="color:#9cdcfe;">s6_addr</span><span style="color:#d4d4d4;">,</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#569cd6;">sizeof</span><span style="color:#d4d4d4;">(</span><span style="color:#569cd6;">struct</span><span style="color:#d4d4d4;"> in6_addr));</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#9cdcfe;">broker</span><span style="color:#d4d4d4;">-&gt;</span><span style="color:#9cdcfe;">sin6_family</span><span style="color:#d4d4d4;"> </span><span style="color:#d4d4d4;">=</span><span style="color:#d4d4d4;"> AF_INET6;</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#9cdcfe;">broker</span><span style="color:#d4d4d4;">-&gt;</span><span style="color:#9cdcfe;">sin6_port</span><span style="color:#d4d4d4;"> </span><span style="color:#d4d4d4;">=</span><span style="color:#d4d4d4;"> </span><span style="color:#dcdcaa;">htons</span><span style="color:#d4d4d4;">(CONFIG_MQTT_BROKER_PORT);</span></div> <br /> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#dcdcaa;">printk</span><span style="color:#d4d4d4;">(</span><span style="color:#ce9178;">&quot;IPv6 Address&quot;</span><span style="color:#d4d4d4;">);</span></div> <div><span style="color:#d4d4d4;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color:#c586c0;">break</span><span style="color:#d4d4d4;">;</span></div> </div> <p>I think you should be able to just add this code to the broker_init() function.</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>