show ip protocols summary or sh ip prot sum
This very simple command will show you all the current routing protocols running on the router.
If you are logging onto any router for the first time, and especially during the CCIE lab this command will instantly tell you what protocols are running and what the process numbers are.
An invaluable command to run when logging onto a router for first time, very handy for the troubleshooting section!
This short post taken from my CCIE Blog