From: Richard Wagner (rfwagner@xxxxxxxxxxx)
Date: Thu Apr 06 2000 - 22:52:24 GMT-3
That is a host unreachable.
Check this link!
http://cco.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/fun_r/fr
prt3/frtroubl.htm#16344
Here's a section of:
http://www.cisco.com/cpress/cc/td/cpress/fund/ith2nd/it2430.htm#xtocid1376713
Destination-unreachable messages include four basic types: network
unreachable, host unreachable, protocol unreachable, and port unreachable.
Network-unreachable messages usually mean that a failure has occurred in the
routing or addressing of a packet.
Host-unreachable messages usually indicates delivery failure, such as a
wrong subnet mask.
Protocol-unreachable messages generally mean that the destination does not
support the upper-layer protocol specified in the packet.
Port-unreachable messages imply that the TCP socket or port is not
available.
An ICMP echo-request message, which is generated by the ping command, is
sent by any host to test node reachability across an internetwork. The ICMP
echo-reply message indicates that the node can be successfully reached.
>From: "Nnanna Obuba" <obuba@bellatlantic.net>
>Reply-To: "Nnanna Obuba" <obuba@bellatlantic.net>
>To: <ccielab@groupstudy.com>
>Subject: trace message
>Date: Thu, 6 Apr 2000 21:21:03 -0400
>
>Hi all,
>
>Can anyone please tell me what the H means when you are trying to trace a
>route
>ie
>
>Type escape sequence to abort.
>Tracing the route to 20.1.1.1
>
> 1 10.10.1.1 28 msec 28 msec 28 msec
> 2 10.10.1.1 !H * !H
>
>
>TIA
>
>Nnanna
>
>
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