Configuring an MPLS TE tunnel to use a dynamic CRLSP
To configure an MPLS TE tunnel to use a CRLSP dynamically established by RSVP-TE, perform the following tasks:
Configure MPLS TE attributes for the links.
Configure IGP TE extension to advertise link TE attributes, so as to generate a TEDB on each node.
Configure tunnel constraints.
Establish the CRLSP by using the signaling protocol RSVP-TE.
You must configure the IGP TE extension to form a TEDB. Otherwise, the path is created based on IGP routing rather than computed by CSPF.