PATH CALCULATION METHOD, MESSAGE RESPONSE METHOD AND RELATED DEVICE

摘要

Embodiments of the present invention disclose a path computation method, a message responding method, and a related device, which are used to improve sensitivity for triggering path recomputation and reduce a quantity of communication messages between network devices. The method in the embodiments of the present invention includes: in the embodiments of the present invention, a second network device receives path requirement information and a recomputation condition that are sent by a first network device; the second network device first obtains by means of computation a path meeting a requirement according to the path requirement information, and sends description information of the path meeting the requirement to the first network device; then the second network device constantly determines whether the recomputation condition is met; and when the recomputation condition is met, the second network device performs path recomputation, and sends description information of a path obtained by means of recomputation to the first network device.