nanog mailing list archives
Re: Recommendation of Tools
From: Nick Hilliard <nick () foobar org>
Date: Wed, 03 Dec 2008 22:54:08 +0000
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.
Tools like smokeping, mtr, traceroute and all that will give you highly skewed results, whose accuracy will usually depend entirely on how busy the CPU is which responds to host IP packets (whether icmp, udp or even tcp). As most large routers push everything through hardware, if you measure your hop latency using inline router response times, your results will be trash. If you want to do this properly, you will need to install dedicated measurement hosts hanging off each router and measure response times to them instead. RIPE TTM boxes are pretty good for this: http://www.ripe.net/ttm/ Nick
Current thread:
- Re: Recommendation of Tools, (continued)
- Re: Recommendation of Tools Anders Lindbäck (Dec 04)
- Message not available
- Re: Recommendation of Tools Anders Lindbäck (Dec 04)
- Re: Recommendation of Tools Craig Holland (Dec 05)
- Re: Recommendation of Tools Hank Nussbacher (Dec 02)
- RE: Recommendation of Tools Christine Lane (Dec 03)
- Re: Recommendation of Tools Antonio Querubin (Dec 03)
- Re: Recommendation of Tools Marc Manthey (Dec 03)
- Re: Recommendation of Tools Andre Gironda (Dec 03)