On Dec 3, 2008 1:52am, Pekka Savola <pekkas@netcore.fi> wrote:

On Tue, 2 Dec 2008, Andrew Mulholland wrote:

On Tue, Dec 2, 2008 at 10:47 PM, Lee, Steven (NSG Malaysia) kin-wei.lee@hp.com> wrote:

Hi all, do you have any recommended tools that can measure latency/delay

hop by hop basis? Preferable the tools can measure the running (live)

traffic.

mtr ? - http://www.bitwizard.nl/mtr/

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.

tcptraceroute is handy for looking at what's going on with tcp http://michael.toren.net/code/tcptraceroute/

--

Pekka Savola "You each name yourselves king, yet the

Netcore Oy kingdom bleeds."

Systems. Networks. Security. -- George RR Martin: A Clash of Kings