US 11,968,108 B2
Method and router for label switched path traceroute
Jinfeng Zhao, Beijing (CN); Xianmin Li, Beijing (CN); and Liang Zhou, Beijing (CN)
Assigned to Telefonaktiebolagget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/432,619
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 22, 2019, PCT No. PCT/CN2019/075855
§ 371(c)(1), (2) Date Aug. 20, 2021,
PCT Pub. No. WO2020/168549, PCT Pub. Date Aug. 27, 2020.
Prior Publication US 2022/0141117 A1, May 5, 2022
Int. Cl. H04L 43/10 (2022.01); H04L 45/50 (2022.01)
CPC H04L 43/10 (2013.01) [H04L 45/507 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method in a router for Label Switched Path (LSP) traceroute, comprising:
receiving an echo request packet containing a label stack;
determining from the label stack that forwarding to a downstream router is to be based on a binding segment identifier;
identifying a plurality of segments included in a binding segment associated with the binding segment identifier; and
transmitting an echo reply packet to a router originating the echo request packet, the echo reply packet containing information indicating a presence of the binding segment identifier in the label stack and indicating a segment identifier associated with each of the plurality of segments.