Hi Oleg, UHCP (micro host configuration protocol) is a RIOT-proprietary protocol that was developed back in 2016 [1] to have a simple drop-in replacement for DHCPv6 prefix delegation (which was not implemented yet back then). Basically it just requests a prefix for a downstream interface from a server by sending a multicast UDP packet to a known address upstream. It is how the `examples/gnrc_border_router` application gets its prefix configured in default mode, but you can use `USE_DHCPV6=1` in the environment to switch to DHCPv6 prefix delegation (for which a client implementation was created in the mean time [2]).
Cheers, Martine [1] https://github.com/RIOT-OS/RIOT/pull/4725 [2] https://github.com/RIOT-OS/RIOT/tree/master/examples/gnrc_border_router#requirements Am 02.11.20 um 12:08 schrieb Oleg Hahm: > Dear reconnecting IOTlers, > > I just came across the following page in the RIOT documentation: > https://riot-os.org/api/group__net__uhcp.html > > Could anybody explain what UHCP is and how it works? The documentation page is > a bit minimalistic and I couldn't find an RFC or similar. > > Cheers > Oleg
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