US 12,323,313 B2
Real-time network-wide link latency monitoring with in-network INT sampling and aggregation
Haoyu Song, San Jose, CA (US)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Guandong (CN)
Filed on Jan. 13, 2023, as Appl. No. 18/154,719.
Application 18/154,719 is a continuation of application No. PCT/US2020/042207, filed on Jul. 15, 2020.
Prior Publication US 2023/0171175 A1, Jun. 1, 2023
Int. Cl. H04L 43/0852 (2022.01); H04L 41/04 (2022.01); H04L 41/34 (2022.01); H04L 43/022 (2022.01); H04L 45/745 (2022.01)
CPC H04L 43/0852 (2013.01) [H04L 41/04 (2013.01); H04L 41/34 (2022.05); H04L 43/022 (2013.01); H04L 45/745 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for real-time network-wide link latency monitoring along a data path performed by a network device, the method comprising:
receiving a packet by the network device;
incrementing a packet counter value by one;
determining whether a sampling cycle flag is set to indicate that a sampling has occurred during a sampling cycle;
determining whether the packet counter value is at least equal to a silent period value (M) when the sampling cycle flag is not set;
determining whether the packet includes an existing in-band network telemetry (INT) header when the packet counter value is at least equal to the silent period value (M);
inserting INT data into the existing INT header of the packet and setting the sampling cycle flag when the packet includes the existing INT header; and
forwarding the packet along the data path towards a destination device when the INT data has been inserted into the existing INT header of the packet and the sampling cycle flag has been set.