[riot-devel] BorderRouter: Global IPV6 address lost in ncache after UDP message sent

Martine Lenders mail at martine-lenders.eu
Tue Aug 30 16:10:19 CEST 2016


Hi Baptiste,


2016-08-30 16:01 GMT+02:00 Baptiste Clenet <bapclenet at gmail.com>:
> Thanks Martine,
> The issue you mentioned seems to be different.
>
> Did you see the neighbor discovery implementation of OpenThread? How
> your new implementation will be able to dicuss with OpenThread
> implementation?
>
> Cheers,
>
> 2016-08-29 19:56 GMT+02:00 Martine Lenders <mail at martine-lenders.eu>:
>> Hi,
>> can you check if this is https://github.com/RIOT-OS/RIOT/issues/5467?
>>
>>> Why or how can a node be removed from ncache? Why the node does not
>> automatically reconnect with BR?
>>
>> As the implementer of the neighbor discovery I can say this: because
>> the neighbor discovery is sh** ;-). It was written in a haste and has
>> a lot of design flaws. I'm working on a replacement (see
>> https://github.com/RIOT-OS/RIOT/issues/5704, happy to hear your
>> thoughts ;-)), but sadly I did not find some time to put heavy
>> implementation efforts into this yet (hopefully in autumn though, so
>> we have something for the October release, fingers crossed).
>>
>> Thanks for reporting and kind regards,
>> Martines
>>
>> 2016-08-29 17:54 GMT+02:00 Baptiste Clenet <bapclenet at gmail.com>:
>>> Hi,
>>> I'm using two SAMR21, one with BR (on A) and the other (on B) with
>>> gnrc_networking example.
>>> I'm on April release.
>>> Switch on A (border router) then switch on B, I'm able to send UDP
>>> message from Linux to 2001:db8 address of B.
>>> If I try to send lot of data (every 100ms), it works for a while and
>>> then B does not receive message anymore. After I see it failed, I
>>> stopped the loop sending UDP message, I checked on BR and 2001:db8
>>> address of B was not here anymore. I can ping B with fe80:: address on
>>> iface 6 but can't with 2001:db8.
>>>
>>> Why or how can a node be removed from ncache? Why the node does not
>>> automatically reconnect with BR?
>>>
>>> Cheers
>>>
>>> --
>>> Baptiste
>>> _______________________________________________
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>>> devel at riot-os.org
>>> https://lists.riot-os.org/mailman/listinfo/devel
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>
>
> --
> Baptiste
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