ICMPv6 type 1 code 3 (Destination Unreachable - address unreachable) is not the same as type 1 code 0 (no route to destination) , but both are shown in mtr output as "no route to host" which is confusing.
address unreachable can be encapsulation failure or disallowed hairpinning, which is different from routing lookup miss. It is probably good to show ICMP error as is, instead of bucketing them into a broad category
ICMPv6 type 1 code 3 (Destination Unreachable - address unreachable) is not the same as type 1 code 0 (no route to destination) , but both are shown in mtr output as "no route to host" which is confusing.
address unreachable can be encapsulation failure or disallowed hairpinning, which is different from routing lookup miss. It is probably good to show ICMP error as is, instead of bucketing them into a broad category
https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml#icmpv6-parameters-codes-2 https://www.iana.org/assignments/icmp-parameters/icmp-parameters.xhtml#icmp-parameters-codes-3