Lab 9 – TI-LFA Node Protection

In the previous chapters, the primary focus was on TI-LFA’s default protection method, which is link protection – a feature that remains active and cannot be disabled by default.

To further bolster network resilience, TI-LFA can be configured to incorporate additional constraints when determining backup paths. Among these, node protection and Shared Risk Link Group (SRLG) protection are widely utilized. These enhancements broaden protection capabilities by considering potential failures that extend beyond individual link failures.

This chapter explores the implementation of TI-LFA node protection specifically within an SR-MPLS network environment. Node protection ensures that if a node or its connecting link fails, traffic can efficiently reroute around the affected node, rather than solely relying on alternative paths for individual links.

Later in this book, a scenario will be presented in Chapter 13 where TI-LFA cannot...