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Re: Measuring PoP to PoP latency--tools to use?
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" <email@example.com> > To: "mike harrison" <firstname.lastname@example.org> > Cc: "Grant A. Kirkwood" <email@example.com>; "Sean Donelan" > <firstname.lastname@example.org>; <email@example.com> > 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 do > this. > > 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 automated > sending > > of 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 trying > to > > > > find something like that to implement for the marketing folk. It could > > > > probably be adapted into something more useful to us though. Suffice > it > > > > > > fping, 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 : firstname.lastname@example.org 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