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_note09186...
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