[riot-devel] Border-router and multicast

Baptiste Clenet bapclenet at gmail.com
Tue May 10 18:05:08 CEST 2016


Ok Martine, Have you found any solution yet?

2016-05-10 9:48 GMT+02:00 Martine Lenders <mail at martine-lenders.eu>:
> Hi Baptiste,
> since IEEE 802.15.4 itself is not a multicast medium (it only supports
> broadcast), and we don't have MLD implemented at this point (which
> configures routers for multicast), multicast is indeed tricky at the moment.
> Let me try something out and I come back to you.
>
> Cheers,
> Martine
>
> 2016-05-10 9:03 GMT+02:00 Baptiste Clenet <bapclenet at gmail.com>:
>>
>> Thanks Alex for your answer.
>>
>> 2016-05-09 19:07 GMT+02:00 Alexander Aring <alex.aring at gmail.com>:
>> > Hi,
>> >
>> > On Mon, May 09, 2016 at 06:20:48PM +0200, Baptiste Clenet wrote:
>> >> 2016-05-09 16:44 GMT+02:00 Alexander Aring <alex.aring at gmail.com>:
>> >> > On Mon, May 09, 2016 at 04:24:34PM +0200, Baptiste Clenet wrote:
>> >> >> Hi Martine,
>> >> >> Thank you for the answer.
>> >> >> Ok ff04::1 is also a multicast address so I add it to every board
>> >> >> with
>> >> >> gnrc_networking and I should be able to ping them with this
>> >> >> multicast
>> >> >> address.
>> >> >> Shouldn't I use:
>> >> >> ifconfig 7 add multicast ff04::1
>> >> >> ?
>> >> >>
>> >> >> I'm missing something here, could give me an explanation please:
>> >> >> Before, I had a transceiver plugged on my linux so I was able to
>> >> >> ping
>> >> >> my board directly using fe80::address so I was able to use the local
>> >> >> multicast address ff02::1, now that I use border router, I'm using a
>> >> >> prefix 2001::db8 (why? and why documentation prefix?) Why can't I
>> >> >> use
>> >> >> fe80 as before?
>> >> >
>> >> > because link-local ff80::/10 will not be routed, between lowpan and
>> >> > ethernet interface, so far I know.
>> >>
>> >> ff80? You meant fe80? I was able to do ping with fe80 and lowpan0.
>> >
>> > Sorry, I think I misunderstood here something completely.
>> >
>> > Your setup what is it?
>> >
>> > Linux (802.15.4/6LoWPAN) <-> RIOT
>> >
>> I used this and I was able to ping6 -I lowpan0 fe80:: but now I use second
>> one
>>
>> > or
>> >
>> > Linux -> TAP (ethernet) <-> RIOT BORDER ROUTER <-> RIOT
>>
>> Now my setup is like this, yes and so what you explain make sense for
>> the RIOT border router, they do what you explain but with RIOT instead
>> of Linux :)
>>
>> My last question is how to send multicast information from Linux to my
>> local network? What Martine tell me to try did not work
>>
>> >
>> > You say something with lowpan0 then I think it's the first one, but I am
>> > not sure now and confused. :-)
>> >
>> > It's a important information, if it's the second one then better
>> > completely ignore what I said before, because I don't know how this
>> > works exactly.
>> >
>> > - Alex
>> > _______________________________________________
>> > devel mailing list
>> > devel at riot-os.org
>> > https://lists.riot-os.org/mailman/listinfo/devel
>>
>>
>>
>> --
>> Baptiste
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>
>
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-- 
Baptiste


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