Issue
What if an NPR 2000 goes away and never comes back even after cycling power to it?
Product Line
TAC INET
Environment
I/NET site
Cause
Cold starting an NPR 2000 is a common troubleshooting technique to clear up a number of communication problems that may arise.
Resolution
If said NPR stops communicating and doesn't come back no matter what, you should cold start it and do a software restore. (See that procedure in How to cold start an NPR 2000.)