Invention Grant
- Patent Title: Mechanisms for packet path tracing and per-hop delay measurement in segment routing with multiprotocol label switching (SR-MPLS) networks
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Application No.: US17524553Application Date: 2021-11-11
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Publication No.: US11683265B2Publication Date: 2023-06-20
- Inventor: Clarence Filsfils , Ahmed Mohamed Ahmed Abdelsalam , Rakesh Gandhi , Pablo Camarillo Garvia
- Applicant: Cisco Technology, Inc.
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Polsinelli
- Main IPC: H04L45/50
- IPC: H04L45/50 ; H04L45/00
Abstract:
A network node receives a data packet. In response to receiving the data packet, the network node performs a lookup on a label stack of the data packet to determine a next hop for the data packet. The network node scans the label stack to identify a Structured Entropy Label (SEL). The SEL includes a Path Tracing Indicator (PTI). The network node computes Midpoint Compressed Data (MCD) as a result of the PTI being set to a pre-defined value. The network node records the MCD in a MCD stack of the data packet by shifting the MCD stack and stamping the MCD on top of the MCD stack. The network node transmits the data packet to the next hop with the recorded MCD stack. The network sink node encapsulates the received data packet to generate an encapsulated data packet and transmits the data packet.
Public/Granted literature
Information query
