An engineer wants to configure Fast Reroute in the network. Which methodology eliminates RSVP configuration in the network? 

Answer options:

A. Enable LDP Fast Synch.
B. Enable IP Fast Reroute.
C. Enable the auto tunnel primary feature.
D. Enable Cisco MPLS TE Fast Reroute.
E. Enable the auto tunnel backup feature.

B

http://www.cisco.com/en/US/docs/ios/12_0st/12_0st10/feature/guide/fastrout.html