Re: schein.debian.org

[Henrique de Moraes Holschuh <hmh@debian.org>]

On Thu, 02 Jun 2011, Kurt Roeckx wrote:
> On Wed, Jun 01, 2011 at 06:07:26PM -0300, Henrique de Moraes Holschuh wrote:
> > On Wed, 01 Jun 2011, Gerald Turner wrote:
> > > Henrique de Moraes Holschuh <hmh@debian.org> writes:
> > >  $ tracepath6 schein.debian.org
> > >   1?: [LOCALHOST]                        0.031ms pmtu 1480
> > >   1:  shub-niggurath.unzane.com                             0.162ms
> > >   1:  shub-niggurath.unzane.com                             0.360ms
> > >   2:  gturner-1.tunnel.tserv14.sea1.ipv6.he.net             6.576ms
> > >   3:  gige-g2-6.core1.sea1.he.net                           5.654ms
> > >   4:  10gigabitethernet9-1.core1.sjc2.he.net               26.522ms
> > >   5:  10gigabitethernet3-2.core1.pao1.he.net               34.657ms
> > >   6:  he.pao1.isc.org                                      29.855ms
> > >   7:  int-0-0-0.r1.sjc3.isc.org                            31.418ms asymm 5
> > >   8:  schein.debian.org                                    27.519ms reached
> > >       Resume: pmtu 1480 hops 8 back 59
> > 
> > 8 hops to get to shein, and *59* hops to get back?!
> 
> That's normal, and it really shouldn't be returning that since it
> has no way to properly detected that in the first place.

Hmm, indeed.  I tried it inside the corporate lan here before I sent the
email, and it seemed to work.   I retried it now over the AS border, and it
doesn't do nearly as good a job...

So, it is not PMTU, nor it is weird routing issues.  And 59 isn't too
diferent from what I get to various destinations in the Internet, now that I
tested tracepath against internet targets.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh