| 摘要 |
Embodiments of the present invention provide a protection switching method and system, and nodes, where the method includes: receiving, by an intermediate node, a protection switching request message sent by an upstream neighboring node of the intermediate node; when the intermediate node determines, according to the protection switching request message, that a protection path resource of the intermediate node is available and that the protection path resource of the intermediate node is idle, sending a first indication message that is used to inform the upstream neighboring node that the protection path resource of the intermediate node is available to the upstream neighboring node, and sending the protection switching request message to a downstream neighboring node of the intermediate node; and receiving, by the intermediate node, a second indication message indicating that a protection path resource of the downstream neighboring node of the intermediate node is available, and establishing a cross-connection of the first protection path on the intermediate node. Therefore, protection switching can be quickly performed while resource usage is improved, thereby improving efficiency and preventing an incorrect connection of a service in a protection switching process. |
