Sultan,
You can do a "show mpls traffic-eng fast-reroute database" or "show mpls traffic-eng fast-reroute log" on the router where the backup tunnel is configured (also known as point of local repair or PLR).
Regards,
Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México