North American Network Operators Group
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Re: Recommendation of Tools

  • From: grenville armitage
  • Date: Wed Dec 03 17:40:39 2008
Lee, Steven (NSG Malaysia) 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.

Regards,
Steven Lee


Not necessarily hop-by-hop, and measures RTT rather than one-way delay,
but if you can packet-sniff at two points in your network our SPP
(Synthetic Packet Pairs) tool for passive round trip time estimation
might be of interest - http://caia.swin.edu.au/tools/spp/documentation.html

Key benefits - you don't need tight clock synchronisation between
measurement points, and you can measure RTT using existing traffic
flowing across your network (no additional traffic needs to be
injected). Key downside - its a research project, only tested under
FreeBSD, and may be entirely unsuitable :)

cheers,
gja