[riot-devel] Connectivity between new NG stack and loopback

Alexandru Razvan Caciulescu alex.darredevil at gmail.com
Thu Jun 25 23:18:29 CEST 2015

Hello Lennart,

Did you by any chance forgot to edit the makefile to include the module for
ng_nativenet and recompile?


2015-06-25 18:49 GMT+03:00 Cenk Gündogan <cenk.guendogan at fu-berlin.de>:

> Hello Lennart,
> On 25.06.2015 16:14, Lennart Dührsen wrote:
>> the method you suggested now works halfway for me, but I still can't
> that's half the battle (:
>> linux~ nc -u fe80::b400:b1ff:fe63:f33d%tap0 54545
> Using nc without the -l flag will start a udp client and connect to the
> riot server. You will however not be able to receive messages on Linux
> without starting a udp server (-l flag). You need to also specify the
> tap0's ipv6 address here > f33c < with the %tap0 suffix, instead of riot's
> ipv6 address, in order to listen on the tap0 device.
>> Additionally, what I don't really understand is how one device (tap0)
>> can have two IPv6 addresses. In the default example for RIOT, where two
> In general, it is completely valid for a device to have multiple ipv6
> addresses. However, this is not the case in this situation. In Linux you
> should only see >one< ipv6 address when you use ip/ifconfig on tap0 with
> this method.
> I am not really experienced enough to tell how ng_nativenet utilizes the
> tun/tap interface in detail.. Maybe it's possible to use tap0 and tap1 and
> the additional bridge to establish a connection between riot and linux..
> But one tap interface seems to be sufficient for this purpose.
>> Btw, using nc as you initially described did not produce any output on
>> either side (nc -ul fe80:...:f33c%tap0 54545).
> Could you try this again and re-check the ipv6 addresses you used? I don't
> know why this shouldn't work..
> Best,
> Cenk
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