Patent ID: 11895014
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A communication method implemented by a first network device, wherein the communication method comprises:
obtaining, from a second network device, a first route and a second route, wherein a first prefix corresponding to the first route is longer than a second prefix corresponding to the second route, wherein the second route is an aggregated route, and wherein the first route indicates that the first prefix is unreachable; and
switching, based on the first route, a next hop of the aggregated route from the second network device to a third network device, wherein either an access side device is dual-homed to the third network device and the second network device or a fourth route advertised by the third network device is a backup route of a third route advertised by the second network device.