I'm studing for MPLS exam and after reading the documentation some aspects about MPLS-TE are still not clear .
I hope you can help me to clarify some concepts:
1)Is RSVP a requirement on every router link of the ISP when we are using dynamic tunnel computation considering that a tunnel could change his path?
2)Is Constrant-based routing(CBR)used when the tunnel is configured using an explicit path?
Yep, RSVP configuration is mandatory.
In Cisco, configuring "mpls traffic-eng tunnels" on a link will enable mpls as well as RSVP-TE (but with zero rsvp bandwidth). There is no separate cli to enable RSVP. "ip rsvp bandwidth " lets u decide the bandwidth to be allocated.