@techreport{li-rtgwg-enhanced-ti-lfa-11, number = {draft-li-rtgwg-enhanced-ti-lfa-11}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-li-rtgwg-enhanced-ti-lfa/11/}, author = {Cheng Li and Zhibo Hu and Yongqing Zhu and Shraddha Hegde}, title = {{Enhanced Topology Independent Loop-free Alternate Fast Re-route}}, pagetotal = 11, year = 2024, month = oct, day = 21, abstract = {Topology Independent Loop-free Alternate Fast Re-route (TI-LFA) aims at providing protection of node and adjacency segments within the Segment Routing (SR) framework. A key aspect of TI-LFA is the FRR path selection approach establishing protection over the expected post-convergence paths from the point of local repair. However, the TI-LFA FRR path may skip the node even if it is specified in the SID list to be traveled. This document defines Enhanced TI-LFA(TI-LFA+) by adding a No-bypass indicator for segments to ensure that the FRR route will not bypass the specific node, such as firewall. Also, this document defines No- bypass flag and No-FRR flag in SRH to indicate not to bypass nodes and not to perform FRR on all the nodes along the SRv6 path, respectively.}, }