公开(公告)号：US20230216779A1

公开(公告)日：2023-07-06

申请号：US17568623

申请日：2022-01-04

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Alexander K. Nelson ,  Goldy Tomy ,  Luis A. Mora ,  Saurabh Mohan

IPC: H04L45/00 ,  H04L45/02 ,  H04L12/46

CPC classification number: H04L45/26 ,  H04L45/02 ,  H04L45/66 ,  H04L12/4633 ,  H04L45/20 ,  H04L12/4641

Abstract: A system for layer-2 path tracing is provided. During operation, the system can send, from an originating device, a layer-2 trace packet with a packet type in a layer-2 header of the layer-2 trace packet. The packet type can indicate the trace packet to be a tracing packet. The system can then receive a layer-2 response packet from a respective participating device, which supports layer-2 path tracing, on a path to a target device of the trace packet. Subsequently, the system can obtain, from a payload of the response packet, trace information of a forward path to the participating device traversed by the trace packet and a reverse path from the participating device traversed by the response packet. The trace information can identify one or more layer-2 devices along the forward and reverse paths, and include one or more layer-2 identifiers corresponding to the identified one or more layer-2 devices.

公开(公告)号：US11991070B2

公开(公告)日：2024-05-21

申请号：US17568623

申请日：2022-01-04

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Alexander K. Nelson ,  Goldy Tomy ,  Luis A. Mora ,  Saurabh Mohan

IPC: H04L45/00 ,  H04L12/46 ,  H04L45/02

CPC classification number: H04L45/26 ,  H04L12/4633 ,  H04L45/02 ,  H04L45/20 ,  H04L45/66 ,  H04L12/4641

Abstract: A system for layer-2 path tracing is provided. During operation, the system can send, from an originating device, a layer-2 trace packet with a packet type in a layer-2 header of the layer-2 trace packet. The packet type can indicate the trace packet to be a tracing packet. The system can then receive a layer-2 response packet from a respective participating device, which supports layer-2 path tracing, on a path to a target device of the trace packet. Subsequently, the system can obtain, from a payload of the response packet, trace information of a forward path to the participating device traversed by the trace packet and a reverse path from the participating device traversed by the response packet. The trace information can identify one or more layer-2 devices along the forward and reverse paths, and include one or more layer-2 identifiers corresponding to the identified one or more layer-2 devices.