[riot-users] I cannot get an address from the BR

Iliyan ILF Stoyanov ilf.stoyanov at gmail.com
Wed Jan 17 18:47:10 CET 2018


will do that.

Just to make sure I'm understanding things correctly:
RIOT does solicit stateless IPv6 addresses by sending RS, and the BR 
should reply with RA. This is part of SLAAC. I have the nagging feeling 
that OpenWRT messes up SLAAC on all it's interfaces somehow.

Before switching to Raspbian, I'll do another round of OpenWRT with a 
sniffer but will leave odhcpd handling just RAs and will disable dhcpv6 
so I make sure I'm just using SLAAC/RA/NDP. After a node solicits an IP 
will proceed to neighbor soliciting, right?

Please let me know if my understanding is correct about this.



On Wed, Jan 17, 2018 at 7:24 PM, smlng <s at mlng.net> wrote:
> Hi again,
>>  On 17. Jan 2018, at 17:14, Iliyan ILF Stoyanov 
>> <ilf.stoyanov at gmail.com> wrote:
>>  thanks for the reply. I'm using openwrt as a BR distro with odhcpd 
>> handling the RA (and also dhcpv6). The setup works between a Pi-Pi 
>> (although my second Pi in the PAN uses dhcpv6 for getting an IP, so 
>> that is not a proof of a working solution so far.
> you could try to use one of your boards as a sniffer, see [1]. So you 
> can check if you see
> Router Solicitations (RS) by RIOT nodes and hopefully Router 
> Advertisements (RA) from your
> RasPi. RIOT needs RAs to (auto) configure its IPv6 interfaces with 
> addresses, there is no
> DHCP client on RIOT (yet).
> Thus, if odhcpd does not send RAs or if it does, these RAs may 
> contain options RIOT does not
> except (e.g., as Kaspar already said on-link flag must not be set), 
> in all cases auto-conf
> may fail in RIOT.
> [1]: https://github.com/RIOT-OS/applications/tree/master/sniffer
> Best,
>   Sebastian
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> users at riot-os.org
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