I currently have a 6500 with a Sup 720 3B. I want to add a second Sup 720 3B for redundancy. I want to minimize the disruption the devices that are currently connected to this 6500. Is adding the redundant Sup as simple as just plugging it in and it will sync up with the current Sup. Will there be any disruption to my currently connected devices? (I already have the appropriate SSO redundancy statements on the 6500, ready to go.) Thanks for any advice you can offer.