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

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/10918#discussion_r253063964">sys/net/gnrc/netif/gnrc_netif_device_type.c</a>:</p>
<pre style='color:#555'>>          case NETDEV_TYPE_IEEE802154:
         case NETDEV_TYPE_NRFMIN:
 #ifdef MODULE_GNRC_SIXLOWPAN_IPHC
             netif->flags |= GNRC_NETIF_FLAGS_6LO_HC;
 #endif
             /* intentionally falls through */
+        case NETDEV_TYPE_CC110X:
</pre>
<blockquote>
<p>I actually had it like that before, but the driver received 6LoWPAN layer 2 fragments that where bigger than the maximum PDU signaled by the driver. I will re-check if that was indeed the case.</p>
</blockquote>
<p>Sounds like a bug. If I find the time I will test later with an MSB-A2 to see what you mean</p>
<blockquote>
<p>If that is indeed the case, where should the header compression occur? I assumed that this needs to be either implemented or enabled at some point and was going to add this later on.</p>
</blockquote>
<p>You would not not need to do anything <code>gnrc_sixlowpan_iphc</code> will start compressing once the <code>GNRC_NETIF_FLAGS_6LO_HC</code> flag is set in the netif (which it is in the line above). So once you move the line up, it <em>should</em> work out of the box.</p>

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