US 12,088,471 B2
Method and apparatus for determining port orientation
Chao Yin, Nanjing (CN); Yongxian Chen, Nanjing (CN); Heyang Liu, Nanjing (CN); Xiang Yu, Nanjing (CN); Hewen Zheng, Nanjing (CN); and Liyang Sun, Nanjing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Nov. 23, 2021, as Appl. No. 17/534,408.
Application 17/534,408 is a continuation of application No. PCT/CN2020/092209, filed on May 26, 2020.
Claims priority of application No. 201910470325.9 (CN), filed on May 31, 2019.
Prior Publication US 2022/0086051 A1, Mar. 17, 2022
Int. Cl. H04L 12/24 (2006.01); H04L 41/12 (2022.01); H04L 45/02 (2022.01)
CPC H04L 41/12 (2013.01) [H04L 45/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for determining a port orientation, the method comprising:
receiving, by a first network device through a first port, a protocol data unit (PDU) sent by a second network device, wherein the PDU carries a topology level of the second network device in a network; and
determining, by the first network device based on the PDU, that the first port is an upstream port or a downstream port.