ICMP reason subcode 0x1, used with ICMP reason code 0x3 to explain why a DestinationUnreachable message was sent.
It is usally generated by a gateway when it does not have a route for the destination specified in the IP packet that caused the error. Often this reason is used when the destination IP is on a network that is locally connected to the router sending the message, but the router cannot solicit an ARP reply for the specified IP address.
2 pages link to DestinationHostUnreachable:
