US 11,855,875 B2
Network topology discovery method and node device
Li Shen, Nanjing (CN); Hanyu Wei, Nanjing (CN); Yinliang Hu, Nanjing (CN); Duoliang Fan, Nanjing (CN); and Yunping Lyu, Nanjing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Apr. 28, 2022, as Appl. No. 17/731,686.
Application 17/731,686 is a continuation of application No. PCT/CN2020/124378, filed on Oct. 28, 2020.
Claims priority of application No. 201911053346.7 (CN), filed on Oct. 31, 2019.
Prior Publication US 2022/0255836 A1, Aug. 11, 2022
Int. Cl. H04L 45/02 (2022.01); H04L 45/12 (2022.01); H04L 45/42 (2022.01)
CPC H04L 45/02 (2013.01) [H04L 45/124 (2013.01); H04L 45/42 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A network topology discovery method, comprising:
sending a link discovery message to a child node device through a first port;
receiving a link discovery acknowledge message sent by the child node device through a second port of the child node device, wherein the link discovery acknowledge message comprises an identifier of the child node device and an identifier of the second port;
determining a first link based on the link discovery acknowledge message, wherein the first link is a link between the first port and the second port; and
sending a port role update message to the child node device through the first port to indicate to the child node device to set the second port of the child node device to an uplink port, wherein the port role update message comprises the identifier of the child node device, the identifier of the second port, and role information of the second port, and the port role update message is used to indicate the child node device to set a role based on the role information of the second port.