I found a ref regarding !A a few minutes ago. It is nearly exactly the same
as what I had thought about the !H. Is one a misprint maybe, and if not, why
do they have two of them, and what is the purpose of two returns that could be
the same thing?
The only souce I can find on this is on the cisco command ref on-line under
troubleshooting commands. It states that !A is returned when a network is
administratively unreachable due to an access list. I found that a few
minutes ago and Donald I forwarded that to you.
However, it implies in my router book the exact same thing regarding !H. What
it actually says there, (cisco press) is that the probe is received but not
forwarded due to an access list, where !H is received.
What is the difference between the two?
Jennifer Cribbs
[EMAIL PROTECTED]
>===== Original Message From "Donald B Johnson Jr" <[EMAIL PROTECTED]>
=====
>jennifer when does a trace rt return an A
>Duck
>----- Original Message -----
>From: Jennifer Cribbs <[EMAIL PROTECTED]>
>To: cisco <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
>Sent: Monday, November 20, 2000 11:13 AM
>Subject: RE: !H !H !H!H
>
>
>On the traceroute command:
>
>!H is returned 3 times if an access list prevents a router from forwarding
>the
>packet to the HOST. The 'trace' command is used to determine the route
>taken
>to a remote host. All the hops are shown as the trace probe moves toward
>the
>destination. Three probes are issued. The response time of each probe will
>be displayed if successful.
>
>The trace command returns a N if the network is unreachable.
>The P is the response if the protocol is unreachable.
>An * is a timeout.
>!H is the return for what I said above but it is regarding a traceroute
>command,
>and not a ping.
>
>Jennifer Cribbs
>[EMAIL PROTECTED]
>
>
>
>>===== Original Message From "Rossetti, Stan" <[EMAIL PROTECTED]>
>=====
>>I thought !A meant this path is blocked by an access list.
>>
>>-----Original Message-----
>>From: Jennifer Cribbs [mailto:[EMAIL PROTECTED]]
>>Sent: Monday, November 20, 2000 12:13 PM
>>To: [EMAIL PROTECTED]
>>Subject: RE: !H not a complete answer
>>
>>
>>This response is returned when an access list somewhere along the path
>>prevents a router from forwarding a packet to the HOST.
>>
>>and that is correct.
>>
>>Jennifer Cribbs
>>[EMAIL PROTECTED]
>>
>>
>>>===== Original Message From "Croyle, James" <[EMAIL PROTECTED]> =====
>>>http://www.cisco.com/warp/public/112/chapter7.htm
>>>
>>>I think you have a routing loop as is described here. Ping from several
>>>stations and map it out.
>>>
>>>Jim
>>>
>>>
>>>-----Original Message-----
>>>From: Miller, Nathan (AZ15)
>>>To: Richard Bosire; Jason yee
>>>Cc: John Huston; [EMAIL PROTECTED]
>>>Sent: 11/20/00 11:15 AM
>>>Subject: RE: !H
>>>
>>>Does it meas that the destination NETWORK is unreachable or the
>>>destination
>>>HOST??
>>>
>>>-----Original Message-----
>>>From: Richard Bosire [mailto:[EMAIL PROTECTED]]
>>>Sent: Monday, November 20, 2000 8:01 AM
>>>To: Jason yee
>>>Cc: John Huston; [EMAIL PROTECTED]
>>>Subject: Re: !H
>>>
>>>
>>>destination unreachable i.e not path to the destination network
>>>
>>>Jason yee wrote:
>>>
>>> hi anyone knows what does the symbol !H means in
>>> traceroute results
>>>
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