[nsp] odd reboot reason on a 7206VXR/NPE300...

[Robert E. Seastrom]

I had a 7206VXR reboot spontaneously on me this evening.  Not
altogether unexpected; it had been up for seven months or so and had
been the subject of a whole lot of reconfiguration over time.

What's odd is this:

router uptime is 5 hours, 2 minutes
System returned to ROM by RPR Switchover at 23:58:30 UTC Sat Apr 12 2003
System restarted at 23:59:55 UTC Sat Apr 12 2003
System image file is "slot0:c7200-p-mz.120-22.3.S1"

RPR switchover?  On a 7206VXR?  Really?

Can anyone offer insight?  Have I found a bug, or is there something
odd afoot here?

                                        ---rob