Calgary <-> Toronto 100% Canadian Fibre Resiliency on failover

Tom Beecher beecher at beecher.cc
Fri Oct 20 21:31:33 CST 2017


"But if provider 1 has its 1 fibre on the CN line and provider 2 has its
1 fibre along CP line (or road), then you can get diversity by getting
bandwidth from both."

That's not diversity. That's just a matter of time before the same backhoe
catches them both. :)

On Fri, Oct 13, 2017 at 6:00 PM, Jean-Francois Mezei <
jfmezei_nanog at vaxination.ca> wrote:

> On 2017-10-13 17:20, Clinton Work wrote:
> >
> > My understanding is that nobody has a 2nd diverse fiber route north of
> > the great lakes from Winnipeg to Toronto.   Every provider makes use of
> > a fiber route south of the great lakes thru the US in order to provide
> > diversity.
>
> But if provider 1 has its 1 fibre on the CN line and provider 2 has its
> 1 fibre along CP line (or road), then you can get diversity by getting
> bandwidth from both.
>
>
> > The following map shows that the CN rail and CP Rail lines across over
> > each other at multiple times from Winnipeg to Toronto.
>
> At Rennie MB, the CN line has a bridge over the CP line. Between Sudbury
> and Toronto, you may have to live with the crossings. But I suspect they
> are bridged too (with some interchange points near Sudbury).
>
> Ideally, there would be some link leftover from when there were tracks
> between Ottawa and Sudbury. Tracks remain between Mattawa and Sudbury.
> (Ottawa-Mattawa removed circa 2012).  Bell Canada still wants to serve
> those areas even if tracks no longer present.
>
>
>
> Note: road has interesting side effects. A new bridge on highway 17
> "broke" when it got too cold: the stay cables on suspension bridge
> contracted and ended up lifting bridge deck by about 1m above ground
> level. So any fibre conduits would have been severed as it crossed from
> ground to bridge.
>


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