Learning about the internet

Mon Nov 3 22:36:29 UTC 2014

Yeap, that's what I was typing up. 

More than likely what we're seeing is just the far of the link from IAD to Paris. This is evident from the fact that the next hop to Frankfurt is only an additional 3ms beyond what is reported as IAD.

-----Original Message-----
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Brian Loveland
Sent: Monday, November 3, 2014 4:33 PM
To: William Herrin
Cc: nanog at nanog.org
Subject: Re: Learning about the internet

Isn't this most likely a side effect of MPLS tunneling and the 93ms jump there is actually the trans-atlantic segment?  All the european hops following it are very close in latency to hop 11.

On Mon, Nov 3, 2014 at 5:14 PM, William Herrin <bill at herrin.us> wrote:

> On Mon, Nov 3, 2014 at 4:15 PM, Paige Thompson <paigeadele at gmail.com>
> wrote:
> > I
> > would be able to find an answer as to why the latency between here 
> > in greece and Los Angeles is roughly ~250ms.
>
> > 10.|-- be2171.mpd22.dca01.atlas.cogentco.com  0.0%    10   62.6  62.7
> >  62.4  63.3   0.0
> > 11.|-- be2112.ccr41.iad02.atlas.cogentco.com  0.0%    10  155.5 155.8
> > 155.5 156.1   0.0
>
> ^^ There's the largest part part of your answer. IAD and DCA are both 
> Northern VA airports; there should be perhaps 4ms of latency between 
> these locations.
>
>
> --
> William Herrin ................ herrin at dirtside.com  bill at herrin.us 
> Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/> May 
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>