Moin, > I will also poke in the linux direction so they can fix their ICMP6 > rate limiting issue.
Another FYI on this: Not ratelimiting ICMP6 Packet-too-big (Type 2) and Echo/Reply (Type 128/129) is the default setting in Linux, see Documentation/networking/ip-sysctl.rst l2776 of the Linux source tree; So if that would have been done according to RFC4443 over there, this would not have surfaced. Still, it might make sense to add a limit for retransmissions/PMTU reduction below the notified MTU on repeated Type 2 up to min-MTU on the OpenBSD side as well. With best regards, Tobias
