Under ordinary conditions, an LSP path does not change unless the path becomes inoperable. Consequently, the router needs to be directed to consider configuration changes made to an LSP and to optimize the LSP path based on those changes. This is accomplished using the mpls re-optimize command as shown in the following.
device# mpls reoptimize lsp to20
Note
On re-optimization of an adaptive LSP, LSP accounting statistics might miss the accounting of some of the packets.