[ipv6-wg] New Document: "IPv6 Troubleshooting for Residential ISP Helpdesks"

At Sun, 26 Oct 2014 11:40:31 -0700,
Jason Fesler wrote:
> 
> On Sun, Oct 26, 2014 at 10:52 AM, Niall O'Reilly <niall.oreilly at ucd.ie> wrote:
> > In the case
> >   mentioned, it looks as if application error HTTP 404 is being
> >   interpreted as indicating IPv6 network target unreachable.  Isn't
> >   this a layering misinterpretation?
> 
> Yes.  But I have limits on what I can do in JavaScript, without
> invoking browser specific or even operating system specific code, or
> depending on plugins.  I can (as far as I know) only detect success,
> failure, and timeout.  Above all, I want the site to operate purely on
> simple clean javascript that works on any popular browser, and
> ideally, even the unpopular javascript-enabled browsers.

  I fear that "simple clean javascript that works on any popular
  browser" may be an unattainable goal.  The jQuery library attempts
  to provide a uniform abstraction layer above the particular
  behaviour of individual browsers.  I've found it useful, but my
  experience is limited, so I can't say whether it achieves all you'll
  need.

> FWIW: I always check IPv4 as a control measure.  I only complain when
> IPv6 fails but IPv4 worked.  This catches the case of apache httpd
> being down; it catches power down; it doesn't catch more subtle
> problems.  When the control is down, I discount it from the list of
> failures (grey instead of red; and the ISP test in particular stops
> counting it).
> 
> Not perfect; but if you can help me improve on this in a way that
> keeps my goal of simple javascript, I'm very much interested in your
> ideas.  In some cases, it may be as simple as expertise (since
> JavaScript is not my "native tongue", so to speak).

  We both share that pedigree! 8-)

> Thanks for the feedback!  And thanks for taking the time to read the
> document.   A lot of people have put a lot of time into that document
> already.  I'm hoping ultimately the community finds the document (and
> the site) useful.

  Thanks for revealing more of the picture to me.

  ATB
  Niall