<p></p>
<p><b>@miri64</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/16228#discussion_r659772598">sys/net/gnrc/network_layer/ipv6/nib/_nib-slaac.c</a>:</p>
<pre style='color:#555'>> -        /* then => tgt_netif->aac_mode = GNRC_NETIF_AAC_DHCP; */
-        DEBUG("nib: would set interface %i to DHCPv6, "
-              "but is not implemented yet", netif->pid);
+
+        /* TODO: How will this flag be used? */
+        netif->ipv6.aac_mode = GNRC_NETIF_AAC_DHCP;
</pre>
<blockquote>
<p>I see, thanks for the clarification :) I was just wondering if the <code>aac_mode</code> field should be used or checked for somewhere else or if this more relevant for future implementations</p>
</blockquote>
<p>Since this PR introduces IA_NA, it might be good if this is checked. But then again, from what I can see I did not seem to have thought of the case that one would use SLAAC <em>and</em> DHCPv6 for address configuration (<code>aac_mode</code> is just an int, not a flag field), so maybe that field needs to be redone as a flag field.</p>

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