[c-nsp] Sup 720 dual engine configurations

[Hank Nussbacher]

On Wed, 12 Apr 2006, Voll, Scott wrote:

I have used Cisco routers for close to 20 years: http://tinyurl.com/l4jtj
and have yet to have the CPU die on me.  That is true for dozens of AGSs,
AGS+s, 7200s, many 7500s (RSPs) and now two 7600s (SUP720s), among my many
clients.  Everything else has failed at some point such as PAs, Flexwans,
GBICs, SFPs, but never yet the chassis or supervisor card.  That is why I
didn't suggest to buy redundant SUPs.

-Hank

> Depends on how long you can go without the Router.  If you are using it
> at your core, how long can you be down?  And what kind of SmartNet
> contract do you have.
>
> We have decided that at one location we can be down 2 hours so we went
> with one but got smartnet of 24x7x2hour and at another location we can't
> be down so we have two 720 and 24x7x4hour smartnet.
>
> >From my experience the redundancy on layer 2 interfaces have been two or
> three Ping packets.  Layer 3 interfaces (ie FlexWAN) has been much
> longer then that <60 seconds.
>
> Hope that helps.
>
> Scott
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of George Antoniou
> Sent: Wednesday, April 12, 2006 9:50 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Sup 720 dual engine configurations
>
> Hi,
>
> We're contemplating installing 2 sup720 engine per chassis -- does it
> make sense to have that type of redundancy / spare?  Are there tech
> notes on ensuring that the config is done correctly (dependency
> analysis) -- i.e. no impact to bgp, igrp, etc when the primary engine
> fails?
>
> Any links, thoughts, experience-shared would be greatly appreciated.
>
> Thanks,
>
> George
>
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