Because I can’t edit: I just saw that RFC 4443 explicitly mentions traceroute when describing how ICMPv6 rate limiting should be implemented, so while there is

Because I can’t edit: I just saw that RFC 4443 explicitly mentions traceroute when describing how ICMPv6 rate limiting should be implemented, so while there is no explicit RFC describing traceroute, it is mentioned and accommodated. RFC 4884 also has mentions traceroute. Edit: and perhaps the worst thing in the blog: it looks like for ICMPv6 (RFC 4443), Packet Too Big error messages are actually MUST now, so every implementation needs to send them.