[AusNOG] Outage that costs Millions

[Matt Carter]

So, not to let this thread quietly die with no real outcome.

I've seen news articles citing 20,000 DSL tails offline I know for a fact that more than 20k DSL tails were affected. The same article also cited "hardware failure" but with diverse fibre this and diverse switch that, and supposed N+1 across the wazoo, I fail to see how that is possible. What I believe I saw was a complete collapse of a large(or total) portion of the MAN. If you consider the experience of Tatt's and others, this _seems_ be consistent in the post-event analysis.

Did *anyone* get a explanation of substance from Telstra directly, other than, Cause:"spanning tree issues" Action:"POP switches tech bridge reset" ?

As others have pointed out a "spanning tree issue" doesn't tear down your network for 90 minutes, it *prevents* it from being torn down for 90 minutes, it could be thought of as a "last resort safety" so to assert a spanning tree issue caused this problem, in my mind, is to assert a lack of spanning tree, meaning the required last resort safety mechanisms were either not in place, or not configured properly. (if they were, how could it be a spanning tree issue??)

Still trying to get my head around exactly what happened..

Anyone?


--matt


> -----Original Message-----
> From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-
> bounces at lists.ausnog.net] On Behalf Of Lincoln Dale
> Sent: Thursday, 1 July 2010 9:54 AM
> To: Andrew Fort
> Cc: ausnog at ausnog.net
> Subject: Re: [AusNOG] Outage that costs Millions
> 
> On 30/06/2010, at 3:44 PM, Andrew Fort wrote:
> >>> What's your view on TRILL?
> >>
> >> Rbridges - Layer 2 Forwarding Based on Link State Routing - what
> isn't there to like about that? :)
> >
> > Not alot - and it should help fix the non-blocking campus problem,
> > too, which'll make the
> > cloud/HPC/you-block-my-forwarding-and-I-block-your-face guys happy.
> >
> > Only thing not to like is the lack of implementations :-).
> 
> .. and then there was one.   http://www.google.com/search?q=fabricpath
> 
> :)
> 
> cheers,
> 
> lincoln.
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