Recommendation of Tools

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/