Cisco Crosswork Planning Design 7.2.x User Guide

MPLS routing

Updated: August 14, 2026

Want to summarize with AI?

Explains how MPLS routings handle LSPs, including their establishment, rerouting procedures, and demand management for effective traffic engineering.

All LSPs other than SR (segment routed) LSPs are routed like RSVP LSPs. For MPLS simulation information specific to these types of LSPs, refer to Configure RSVP-TE Routing and Configure Segment Routing.

LSPs are established under normal operation: that is, with failures not taken into account.
Any LSPs that are affected by the failures are rerouted. Depending on the LSP path settings, reroutes might involve moving to a secondary path, dynamically rerouting the LSPs, or rerouting based on a segment list.
Demands are routed using the established LSPs using the specified IGP protocols given the specified failure scenarios.
LSP utilizations are calculated from the demand traffic using the specified traffic level.

Need help?

Open a support case

(Requires a Cisco Service Contract)

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.