An IPv6 datagram could not be forwarded because it exceeds the MTU of the next-hop link, and IPv6 does not permit fragmentation by routers. Used by Path MTU Discovery to inform the source of the link MTU.
icmpv6-2
icmp An IPv6 datagram could not be forwarded because it exceeds the MTU of the next-hop link, and IPv6 does not permit fragmentation by routers. Used by Path MTU Discovery to inform the source of the link MTU.