[c-nsp] Data Center switch replacement

[Randy McAnally]

> How about you individually move each connection over to the secondary
> switch one at a time.  This should only be a 30 second downtime 
> window per port, I'd think?  Once you've migrated everybody off of 
> the primary switch, pull it, upgrade it and then move everybody back 
> one-by-one?  This would minimize everybody's downtime and I think 
> would go over better with your clients.  Plus, you can drag out the 
> upgrade over time rather than an "all or none" scenario. 

Agreed.  What if something goes wrong or takes longer than expected --
wouldn't you like to know by the time you've moved the first cable and not
after the original switch is completely offline and de-racked?