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.
Okay, assuming the new SUP is native IOS also. It is better off to go into the new SUP to make sure it boot from the CF. The reason is the default boot variable might point to the sup-bootdisk instead of disk0, if this is the case, the box might be in standby cold, and you will have to manually copy and reload the standby/new SUP. The way I posted before is you will go into ROMMON and force it to boot from disk0, and you know what is on disk0 (matching the IOS version on you active one). This way, it will be in standby hot when it comes up.
If your new one is not in native mode, you will have to convert it. I can't think of a way to convert it without taking the box down since you don't have spare chassis.
Good point. I have got some redundant sup-720-3C, lately and they all come with native IOS version, mostly SXI. So, I guess it depends on how old the sup is right?