RE: sup720 memory parity error

There should be a large solar flare event soon actually. May want to read
IBM's single bit parity error white paper. In newer systems including cisco's
HFRs they have single bit error correcting memory controllers. Gsr 120xx
backplanes used to be painfully susceptible to errors as well back in the
day.

-----Original Message-----
From: Jason Morris
Sent: 8/4/2010 10:49:48 PM
To: Carlos G Mendioroz
Cc: Cisco certification
Subject: Re: sup720 memory parity error
yep, if it had 2 sups it wouldn't be as susceptible to cosmic radiation!!

http://www.cisco.com/en/US/ts/fn/200/fn25994.html

that answered my question perfectly, thanks Carlos.

On Wed, Aug 4, 2010 at 2:17 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:

> Sups are loosely coupled, i.e., they do not share memory.
> Parity error on one will crash it, and force a switchover if it was the
> active one. Parity errors on both... will trigger an EMI monitoring of
> the place where you have the switch ? (or a reference check of the
> provider of it ? :)
>
> On a reread of your message, sounds like you don't have redundant sups,
> so answer is yes, they should.
>
> -Carlos
>
> Jason Morris @ 4/08/2010 17:55 -0300 dixit:
> > Hey guys,
> > would having duel sups in a 6500 keep it from reloading when one sup got
> a
> > memory parity error, or would it crash both supervisors?
> >
> > Thanks
> > Jason
> >
> >
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> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina

Blogs and organic groups at http://www.ccie.net
Received on Thu Aug 05 2010 - 02:37:22 ART