US 12,309,058 B2
Communication method and apparatus
Jiajia Dong, Beijing (CN); and Zhibo Hu, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Dec. 27, 2023, as Appl. No. 18/397,800.
Application 18/397,800 is a continuation of application No. 17/724,886, filed on Apr. 20, 2022, granted, now 11,895,014.
Application 17/724,886 is a continuation of application No. PCT/CN2020/117139, filed on Sep. 23, 2020.
Claims priority of application No. 201911008408.2 (CN), filed on Oct. 22, 2019; application No. 201911046892.8 (CN), filed on Oct. 30, 2019; and application No. 201911137412.9 (CN), filed on Nov. 19, 2019.
Prior Publication US 2024/0129227 A1, Apr. 18, 2024
Int. Cl. H04L 45/24 (2022.01); H04L 45/00 (2022.01); H04L 45/17 (2022.01)
CPC H04L 45/24 (2013.01) [H04L 45/17 (2022.05); H04L 45/22 (2013.01)] 20 Claims
OG exemplary drawing
 
15. A network system comprising:
a second network device;
a third network device; and
a first network device configured to:
obtain an aggregated route corresponding to a second prefix;
obtain a first indication indicating that a first prefix is unreachable, wherein the first prefix is longer than the second prefix; and
switch, based on the first indication, from a first path between the first network device and the second network device corresponding to the first prefix to a second path between the first network device and the third network device corresponding to a third prefix,
wherein the second path is a backup path for the first path, and
wherein the third prefix is longer than the second prefix.