BGP Problem on 04/16/2007

Fri Apr 20 15:05:14 UTC 2007

On Fri, Apr 20, 2007 at 04:52:04PM +0200, Daniele Arena wrote:
> 
> >> I remember this because I had such a reload and it was during a period 
> >of heavy cosmic activity.. as the hardware had always been reliable and 
> >was reliable after this was beleived to be the cause
> >
> >We have also started to use this as the standard excuse.
> >Up to now, people believe us...
> 
> Well, there is some documentation on Cisco containing references to
> cosmic rays and parity errors:
> 
> http://www.cisco.com/en/US/products/hw/routers/ps341/products_tech_note09186a00800942e0.shtml
> 
> Cisco 7200 Parity Error Fault Tree
> 
> "As with all computer and networking devices, the NPE is susceptible
> to the rare occurrence of parity errors in processor memory. Parity
> errors may cause the system to reset and can be a transient Single
> Event Upset (SEU or soft error) or can occur multiple times (often
> referred to as hard errors) due to damaged hardware. SEUs or soft
> errors are caused by "noise" most frequently due to high-energy
> neutrons generated in the atmosphere by cosmic rays. For more
> information on SEUs, refer to the Increasing Network Availability
> page.

yup, thats the reference i was referring to.. we indeed had a single event upset on an NPE :)

Steve