Recommendation of Tools

Pekka Savola pekkas at
Wed Dec 3 11:00:12 UTC 2008

On Tue, 2 Dec 2008, Antonio Querubin wrote:
> On Wed, 3 Dec 2008, Pekka Savola wrote:
>>  FWIW, Mtr measures latency/delay and loss based on ICMP messages heard
>>  back from the routers on path.  As a result, in almost all cases, the real
>>  hop-by-hop latency of actual end-to-end data packets is better than it can
>>  report.
> mtr has a recently added '-u' option to use UDP instead of ICMP echo 
> requests.

But that doesn't change the gist of my message: it's still relying on 
ICMP ttl exceeded messages sent by the routers on the path to check 
the delays etc.  As such it suffers from basically the same 
limitations as ICMP probing.

Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

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