Summary

This chapter explores the implementation of TI-LFA within the SR-MPLS topology. It provides an overview of classic LFA, RLFA, and TI-LFA calculation methods.

Through straightforward configuration steps, TI-LFA is enabled on all IS-IS connections for every router in the network. Upon completion of the configuration process, the lab verifies the operational status of TI-LFA, ensuring its successful implementation. The verification process entails examining the output to confirm the presence of backup routes in the RIB, FIB, and LFIB for each route in a network. This verification procedure underscores the robustness of TI-LFA as a network resilience mechanism.

Furthermore, the chapter offers insights into the backup path calculation method, shedding light on the underlying principles governing the rerouting of traffic if there are link or node failures. By explaining the details of backup path calculation, the chapter equips you with a comprehensive understanding of how...