From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Wed Sep 11 2002 - 17:24:49 GMT-3
At 11:04 AM -0700 9/11/02, Becky Qiang wrote:
>I've heard of such thing. Both ping and traceroute command in Cisco CLI are
>developed based on ICMP...Becky
Ping is completely ICMP. Traceroute, in almost everyone's
implementation except Microsoft, is half UDP and half ICMP.
In the example below, I've skipped repeated sends in the interest of clarity.
Ping Traceroute
1. Send ICMP Echo Request 1. Start with UDP packet with a high,
undefined port and TTL=1.
2. Receive ICMP Echo Reply from 2. Receive ICMP TTL Expired from first hop
destination
3. Send UDP packet with a high,
undefined port and TTL=2.
4. Receive ICMP TTL Expired from 2nd hop
...continue,increasing TTL
>
>
>----- Original Message -----
>From: "Ravi Chandran" <s_ravichandran@hotmail.com>
>To: <ccielab@groupstudy.com>
>Sent: Wednesday, September 11, 2002 9:09 AM
>Subject: non-ICMP ping and non-ICMP traceroute
>
>
>> Hi everyone,
>>
>> While in a telenet session on a Cisco switch, can I generate a non-ICMP
> > ping and non-ICMP traceroute from the command line?
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