mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2025-12-28 07:51:19 +01:00
555c62de51
In accordance with RFC 6775, section 5.2 an NCE should be set STALE when an ARO renews the address registration for the address: > The routers SHOULD NOT garbage-collect Registered NCEs (see > Section 3.4), since they need to retain them until the Registration > Lifetime expires. Similarly, if NUD on the router determines that > the host is UNREACHABLE (based on the logic in [RFC4861]), the NCE > SHOULD NOT be deleted but rather retained until the Registration > Lifetime expires. A renewed ARO should mark the cache entry as > STALE. Thus, for 6LoWPAN routers, the Neighbor Cache doesn't behave > like a cache. Instead, it behaves as a registry of all the host > addresses that are attached to the router.