ICMP type 3, Destination unreachable message
The ICMP unreachable message, with code "host unreachable," will be sent by Router B to Fred, in response to Fred's packet destined for 10.1.2.14. • Can't fragment—This code is the last of the three ICMP unreachable codes that might be sent by a router. Fragmentation defines a process in which a router needs to forward a packet, but the Ping and ICMP Error Messages | ITGeared.com Ping is a network tool mainly used to test whether a host is reachable across an IP network and to measure the round-trip time for packets sent from source to the destination computer. Ping works by sending Internet Control Message Protocol (ICMP) echo request packets to the destination host and waits for an ICMP response. ICMP Message Types | Network Layer/Internet Protocols Destination Unreachable—Type 3. ICMP Type 3 message Destination Unreachable alerts a source host of delivery problems encountered while trying to reach the destination. Note that a destination host sends only code types 2 and 3; a router can send all codes. Destination Unreachable uses several code values to further describe the function of
VMware - Destination host unreachable |VMware Communities
ICMP Destination Unreachable (Host administratively Apr 25, 2013
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.
Host Unreachable ( U ) - InetDaemon's IT Tutorials May 19, 2018 The TCP/IP Guide - ICMPv4 Destination Unreachable Messages Host Unreachable. The datagram was delivered to the network specified in the network ID portion of the IP address but could not be sent to the specific host indicated in the address. Again, this usually implies a routing issue. 2. Protocol Unreachable Configuring ICMP - Hewlett Packard Enterprise The destination host does not have the destination TCP or UDP port specified in the packet. In this case, the host sends the ICMP Port Unreachable message to the HP device, which in turn sends the message to the host that sent the packet. Protocol: The TCP or UDP protocol on the destination host is not running. Destination Host Unreachable - OpenVPN Support Forum