ICMP Types - Network Direction

When the packet is received by remote gateway but it failed to find remote host, you will receive ICMP Echo Destination Host Unreachable message. NOTE: If your local address is returned as 169.254.y.z, you have been assigned an IP address by the Automatic Private … ICMP host mysystem unreachable - admin prohibited - Red ICMP host mysystem unreachable - admin prohibited Environment. Red Hat Enterprise Linux 6.x; Red Hat Enterprise Virtualization Hypervisor 6.x; Subscriber exclusive content. A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions. icmp - tcpdump host unreachables for specific host

"Host unreachable" means that the kernel can't decide which adapter to use to send the packet so it gives up and drops the packet. The Metric for your local network is 9. That ought to be 0 or 1. However the Linux kernel is rumoured to ignore the metric. I would try to add a route to the specific host…

The ICMP destination unreachable message is generated by a router to inform the source host that the destination unicast address is unreachable. The IP header plus the first 8 bytes of the original datagram's data is returned to the sender. ICMP - Destination Unreachable Message Analysis The ICMP - Destination host unreachable message is one which a user would usually get from the remote gateway when the destination host is unreachable. If, in the destination host, the IP module cannot deliver the packet because the indicated protocol module or process port is not active, the destination host may send an ICMP destination

Destination Host Unreachable - over bridge with static IP

The Reply from Destination host unreachable. is after the destination MAC address has timed out of the source/router's ARP cache, and the source/router no longer has, or can get, a MAC address for the destination. Eventually, the destination comes back up, and it responds to the ARP request of the source/router, and your ping is How to Fix This Destination Host Unreachable May 01, 2020 ping response "Request timed out." vs "Destination Host As I understand it, "request timeout" means the ICMP packet reached from one host to the other host but the reply could not reach the requesting host. There may be more packet loss or some physical issue. "destination host unreachable" means there is no proper route defined between two hosts.