[c-nsp] Catalyst 6500 Supervisor Engine Redundancy

[Dave Lim]

Hi group,

I am trying to configure Sup 720 engine redundancy for the first time.
There's 3 types of sup engine as in the Catalyst 6500 configuration guide.

Route processor redundancy (RPR):

Route processor redundancy plus (RPR+)

Single router mode with stateful switchover (SRM with SSO)

Nonstop Forwarding (NSF) with SSO:

My questions are, I have asked my colleagues and they have seen more of RPR
and RPR+ deployed. My question is, which type of sup engine redundancy do I
use and under what circumstances.

Thanks.