[riot-notifications] [RIOT-OS/RIOT] gnrc_ipv6_simple_subnets: auto-configuration for nested subnets on a simple tree topology (#16536)

benpicco notifications at github.com
Tue Aug 31 13:36:23 CEST 2021

@benpicco commented on this pull request.

> + * tree topology.
+ *
+ * If a sufficiently large IPv6 prefix is provided via Router Advertisements, a
+ * routing node with this module will automatically configure subnets from it for
+ * each downstream interface.
+ *
+ * There can only be a single routing node on each level of the network but an
+ * arbitrary number of leaf nodes.
+ *
+ * ![Example Topology](gnrc_ipv6_auto_subnets_simple.svg)
+ *
+ * The downstream network(s) get the reduced prefix via Router Advertisements and
+ * the process repeats until the bits of prefix are exhausted. (The smallest subnet
+ * must still have a /64 prefix.)
+ *
+ * The downstream router will send a router advertisement with only a

With this PR there can only be a single downstream router on each level.
If you want multiple downstream routers on the same link, you'll need #16750 

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