Patent ID: 11936551
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 8:
9. The method according to claim 6, wherein the BGP route comprises a first IP prefix; and
wherein determining whether the BGP route is abnormal comprises:
when the first AS number does not correspond to the origin autonomous system, a BGP session is established between the neighboring autonomous system and a first neighbor autonomous system of the neighboring autonomous system, a BGP session is established between the neighboring autonomous system and a second neighbor autonomous system of the neighboring autonomous system, the neighboring autonomous system has received a route that comprises the first IP prefix and that is from the second neighbor autonomous system, and the neighboring autonomous system has not advertised a route comprising the first IP prefix to the first neighbor autonomous system, determining, by the network device, that the BGP route is abnormal, wherein the first neighbor autonomous system and the second neighbor autonomous system have respective AS numbers comprised in the one or more AS numbers.