[c-nsp] cisco memory bug / propabilities?

[Frank Bulk]

My understanding of this issue is that if the memory is bad you will discover this when rebooting the line card.  While it's possible that the last power cycle is the one that brought the card to naught, it's still wiser to test it rather than not test it at all.

Frank

-----Original Message-----
From: Andrew Miehs [mailto:andrew at 2sheds.de] 
Sent: Friday, October 31, 2014 11:15 PM
To: Frank Bulk
Cc: Painting, Stuart; <cisco-nsp at puck.nether.net>
Subject: Re: [c-nsp] cisco memory bug / propabilities?

You do know that testing one of the line cards with this issue doesnt really help, as you may have just used up its last restart.... :(

Sent from a mobile device

> On 1 Nov 2014, at 10:58, "Frank Bulk" <frnkblk at iname.com> wrote:
> 
> This is why I tested the replacement line card before I started the maintenance window. =)
> 
> Frank
> 
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Painting, Stuart
> Sent: Friday, October 31, 2014 6:05 AM
> To: 'cisco-nsp at puck.nether.net'
> Subject: Re: [c-nsp] cisco memory bug / propabilities?
> 
> We only have a modest number of Cat6500 switches, so these results may
> not be statistically significant.
> 
> Of the 8 Cat6500 switches we have powered off/on in the past 12 months
> (each fitted with multiple "high-risk" cards) one switch suffered a
> failure of one card.
> 
> Only one failure but it was a doozy: not only did the line card fail, but
> so did the replacement line card...
> 
> 
> 
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Gert Doering
> Sent: 31 October 2014 09:47
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] cisco memory bug / propabilities?
> 
> Hi,
> 
> there's the infamous cisco memory bug "reboot and see your boxes die" - with
> the recent IOS software fixes, I have a couple of 6500s that need a reboot
> now, and I'm a bit scared - read: do I plan for "I reboot as usual, and
> there is a remote chance that hardware will not come back, so ensure 
> a longer-than-planned outage is acceptable", or "I really should have a 
> full set of spare boards sitting beside the to-be-rebooted box, because 
> 90% of all boards will die"...?
> 
> What are *your* experiences with dieing cisco memory, in particular on 6500s?
> 
> I've heard horror storries from ASA owners, but not very much from 6500 
> owners yet...  (and that's not because "nobody but me is using them 
> anymore").
> 
> The advisory
> 
>  http://www.cisco.com/web/about/doing_business/memory.html#~impacted
> 
> is not very specific...
> 
> gert
> -- 
> USENET is *not* the non-clickable part of WWW!
>                                                           //www.muc.de/~gert/
> Gert Doering - Munich, Germany                             gert at greenie.muc.de
> fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
> 
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