On Thu, Feb 28, 2008, Joe Abley wrote:
>
> On 28-Feb-2008, at 09:26, Adrian Chadd wrote:
>
> >Then you probably haven't been on the ass end of a
continental fibre
> >link
> >drop. That actually mattered.
>
> If both sides of your SONET ring drop, then surely
you're as dead in
> the water as you would be if each side of the ring was
being used as a
> separate, unprotected circuit.
>
> (But quite possibly I'm missing your point.)
Well, the "someone goes and uses as much of their link
capacity as they
can, then they lose a 10ge circuit, and suddenly everything
is degraded
beyond usefulness."
I'm way, way out of the loop with such things these days,
but the few times
this has happened on a specific Perth <-> Sydney
circuit which almost
everyone seems to use, -everything- degrades. As in, Perth
seems almost
completely isolated from the rest of the country. I'm very
surprised said "O"
provider doesn't have a redundant path for all the MPLS
tunnels that happen
to go over it. 
Adrian
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