I just got a replacement 2901 due to a bad power supply and while configuring it to be put into production I've come across an inability to enter the ip sla 1 command. I'm given a very limited amount of options, when I was expecting to be able to enter an entry #, enable, schedule, etc. It looks like the NX-OS is universal. There doesn't appear to be a need for a particular flavor in order to get certain commands. I had this working on the router that went belly up and the feature is available on another 2900 I have at a different location. Am I missing a prerequisite command?