Computation of unreserved bandwidth optimized RSVP dynamic bypass LSP

The Constrained Shortest Path First (CSPF) can optionally use a different approach to protect a link or a node by leveraging the computation based on unreserved bandwidths on traffic engineering (TE) links. To enable this feature, use the optimize bandwidth configuration statement at the edit protocols rsvp interface interface linkprotection hierarchy level. While the default approach of RSVP bypass produces a bypass method that optimizes traffic engineering (TE) metric, enabling the new configuration statement maximizes the end-to-end unreserved bandwidth.