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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Measuring PoP to PoP latency--tools to use?
Sean Donelan wrote: > > On Wed, 22 August 2001, k claffy wrote: > > On Wed, Aug 22, 2001 at 06:08:15PM +0200, Adam Obszynski wrote: > > > What tools exist that will periodically log into multiple routers and run > > > ping tests > > > to various destinations and then record the results in graphical form? > > > > maybe the RTR cisco router feature for sonde-like probing ? > > InternetMCI(purchased by Cable & Wireless) and AT&T spent a lot of > effort developing their tools. I haven't seen any commercially available > systems which come close. C&W and AT&T seem to be unique among huge backbone > providers in publishing their network performance. > > However, an alternative for measuring round-trip times with ICMP is > setting up a full mesh of NTP assocations. As part of the calculations > of the "time" get an ongoing measurement of network delay between the > routers. You can use your favorite tool to read the NTP associations > table, and generate a nice web page. I believe this is how UUNET use > to do their version. There used to be a site somewhere (I think Andover or Keynote sucked up the domain, but it was a while ago) that had a very nice little script that pinged IP addresses and presented the visitor with average latency to those addresses. Looked something like this: UUNet (x.x.x.x) -> 38 ms (green) C&W (x.x.x.x) -> 68 ms (yellow) AOL (x.x.x.x) -> 400 ms (red) 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 to say, I haven't found anything, and I'm about to dive into a week-long coding spree writing my own. If anyone can connect me with something that'll work, I'd be happy to send a case of their choice of beer. ;) Grant
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