nanog mailing list archives
Re: Measuring PoP to PoP latency--tools to use?
From: Marshall Eubanks <tme () 21rst-century com>
Date: Thu, 23 Aug 2001 12:03:09 -0400
Brian wrote:
I once worked for a company that wrote a unix script that worked like this. Basically imagine a quare chart will all the pops listed across the top and down the left side. Every few minutes, each pop tries a small ping burst to ping all of the others, and the values are filled into the chart. Results are color coded as green, yellow, and red. Brian ----- Original Message ----- From: "Sam Thomas" <sthomas () lart net> To: "mike harrison" <meuon () highertech net> Cc: "Grant A. Kirkwood" <grant () virtical net>; "Sean Donelan" <sean () donelan com>; <nanog () merit edu> Sent: Thursday, August 23, 2001 7:27 AM Subject: Re: Measuring PoP to PoP latency--tools to use?when someone asked me to do something like this, i waded through caida's site and came accross this: http://www-iepm.slac.stanford.edu/pinger/ it's pretty cool stuff. requires *nix box, perl5, and some sort of webserver software to produce simple reporting. there's also (optionally) utilities that draw some pretty graphs that require gnuplot/ppmtogif. imho, this is considerably better than logging into your router to dothis.routers are much better at forwarding packets than sending/receiving them. (except older non-distributed routers, which aren't particularly great at either for high traffic volumes) other bonus: no automatedsendingof passwords from a box that might not get much admin attention. one could probably modify these tools to use fping, but i just played around with them for edutainment purposes. there's no mention of copyright that i can find, but one should ask before using for commercial purposes. On Thu, Aug 23, 2001 at 08:32:17AM -0400, mike harrison wrote:It was cheesy, and not particularly scientific, but I've been tryingtofind something like that to implement for the marketing folk. It could probably be adapted into something more useful to us though. Sufficeitfping, from Stanford originally, now at www.fping.com might be useful, it pings multiple hosts at the same time (fast, efficient) It has easy to parse output and easily gives results like: fping -e <targets www.chatt.net is alive (0.32 ms) www.att.net is alive (27.5 ms) www.uu.net is unreachable-- Sam Thomas Geek Mercenary
The NLANR Multicast beacon does this now for multicast : http://dast.nlanr.net/Projects/beacon/ http://beaconserver.accessgrid.org:9999/ It would be pretty trivial to modify this for a set of unicast beacons; the code is available. There would have to be beacon management or discovery (now done implicitly by multicast). You might want to lower the beacon send rate as well. -- Regards Marshall Eubanks T.M. Eubanks Multicast Technologies, Inc 10301 Democracy Lane, Suite 410 Fairfax, Virginia 22030 Phone : 703-293-9624 Fax : 703-293-9609 e-mail : tme () multicasttech com http://www.on-the-i.com Test your network for multicast : http://www.multicasttech.com/mt/ Check the status of multicast in real time : http://www.multicasttech.com/status/index.html
Current thread:
- Re: Measuring PoP to PoP latency--tools to use?, (continued)
- Re: Measuring PoP to PoP latency--tools to use? Jake Khuon (Aug 22)
- Re: Measuring PoP to PoP latency--tools to use? Larry Diffey (Aug 22)
- Re: Measuring PoP to PoP latency--tools to use? Joshua Goodall (Aug 28)
- Re: Measuring PoP to PoP latency--tools to use? Grant A. Kirkwood (Aug 22)
- Re: Measuring PoP to PoP latency--tools to use? E.B. Dreger (Aug 22)
- Re: Measuring PoP to PoP latency--tools to use? mike harrison (Aug 23)
- Re: Measuring PoP to PoP latency--tools to use? Sam Thomas (Aug 23)
- Re: Measuring PoP to PoP latency--tools to use? Brian (Aug 23)
- Re: Measuring PoP to PoP latency--tools to use? Marshall Eubanks (Aug 23)
- Re: Measuring PoP to PoP latency--tools to use? Christopher A. Woodfield (Aug 23)