Abstract: Embodiments of this application disclose a network topology display method and a communication apparatus, to improve availability and a visualization effect of a network management and control system. The method in embodiments of this application includes: A communication apparatus obtains a multi-level subnet topology structure, determines a subnet density of a first network element based on a layout setting of a user for a physical position of a subnet of the first network element in the multi-level subnet topology structure, and then determines a current scale based on a zoom operation performed by the user on a display area; and when a product of the scale and the subnet density is greater than a preset value, the communication apparatus expands the subnet of the first network element.

Abstract: In a troubleshooting method, a controller first determines that a fault occurs on a first multi-layer link passing through a first port on a first network device, where the first multi-layer link is a link in a link aggregation group between the first network device and a second network device. The controller then releases an optical layer resource of the first multi-layer link, and deletes the first multi-layer link from the link aggregation group. The controller further establishes, a second multi-layer link for restoration of the first multi-layer link, based on a first idle port on the first network device and a second idle port on a target network device, and adds the second multi-layer link to a target link aggregation group between the first network device and the target network device.

Abstract: This application describes a fault protection method for an optical network. A cross-layer controller connecting an optical network and an IP network sends, to an optical controller in the optical network, an indication that a first optical service in an optical fiber belongs to a first priority and a second optical service in the optical fiber belongs to a second priority. The first priority is related to a feature of the first IP link in the IP network, and the second priority is related to a feature of the second IP link in the IP network. When the optical fiber is faulty, a protected priority of any optical service belonging to the first priority is higher than a protected priority of any optical service belonging to the second priority.

Abstract: This disclosure provides a network control method, an apparatus, and a system, to manage an IP network and an optical network together, thereby properly controlling use of resources of an entire network. The method includes: obtaining first link state information and second link state information, where the first link state information is used to indicate a link state of an Internet Protocol IP network, and the second link state information is used to indicate a link state of an optical network; determining third link state information based on the first link state information and the second link state information, where the third link state information includes the link state of the IP network and the link state of the optical network; and computing a path based on the third link state information.

Abstract: In a troubleshooting method, a controller first determines that a fault occurs on a first multi-layer link passing through a first port on a first network device, where the first multi-layer link is a link in a link aggregation group between the first network device and a second network device. The controller then releases an optical layer resource of the first multi-layer link, and deletes the first multi-layer link from the link aggregation group. The controller further establishes, a second multi-layer link for restoration of the first multi-layer link, based on a first idle port on the first network device and a second idle port on a target network device, and adds the second multi-layer link to a target link aggregation group between the first network device and the target network device.

Abstract: Embodiments of the present invention provide a method and a device for processing location information of a fault point. The method includes: obtaining, by an ingress node of a tunnel, first location information of a fault point on a link traversed by the tunnel, where the first location information of the fault point includes an identifier of an upstream node of the fault point and an identifier of an interface that is connected to the fault point and located on the upstream node of the fault point; and providing, by the ingress node, the first location information of the fault point to a user so that the user determines a location of the fault point corresponding to a tunnel fault. With the technical solutions of the present invention, the location of the fault point can be determined, and efficiency of troubleshooting specific to the tunnel fault can be improved.

Abstract: Embodiments of the present invention provide a method and a device for processing location information of a fault point. The method includes: obtaining, by an ingress node of an LDP LSP, first location information of a fault point on a link traversed by the LDP LSP, where the first location information of the fault point includes an identifier of an upstream node of the fault point and an identifier of an interface that is connected to the fault point and located on the upstream node of the fault point; and providing the first location information of the fault point to a user so that the user determines a location of the fault point corresponding to an LDP LSP fault. Therefore, the location of the fault point corresponding to the LDP LSP fault can be determined, and efficiency of troubleshooting specific to the LDP LSP fault can be improved.

Abstract: A method and an apparatus for determining a traffic forwarding path and a communications system are provided that belong to the field of communications technologies. The method includes acquiring, by a first network node, link quality information of each link in a first autonomous system, the link quality information of each link includes an individual link quality index of each link, or, the link quality information of each link includes an index reference value calculated according to the individual link quality index of each link, where the link quality index includes one or more dynamic link quality indexes; and determining, according to the currently acquired link quality information of each link in the first autonomous system, a path used by the first network node to forward traffic to each second network node. The present invention has relatively good network adaptability.

Abstract: Embodiments of the present invention provide a method and a device for processing location information of a fault point. The method includes: obtaining, by an ingress node of an LDP LSP, first location information of a fault point on a link traversed by the LDP LSP, where the first location information of the fault point includes an identifier of an upstream node of the fault point and an identifier of an interface that is connected to the fault point and located on the upstream node of the fault point; and providing the first location information of the fault point to a user so that the user determines a location of the fault point corresponding to an LDP LSP fault. Therefore, the location of the fault point corresponding to the LDP LSP fault can be determined, and efficiency of troubleshooting specific to the LDP LSP fault can be improved.

Abstract: Embodiments of the present invention provide a method and a device for processing location information of a fault point. The method includes: obtaining, by an ingress node of a tunnel, first location information of a fault point on a link traversed by the tunnel, where the first location information of the fault point includes an identifier of an upstream node of the fault point and an identifier of an interface that is connected to the fault point and located on the upstream node of the fault point; and providing, by the ingress node, the first location information of the fault point to a user so that the user determines a location of the fault point corresponding to a tunnel fault. With the technical solutions of the present invention, the location of the fault point can be determined, and efficiency of troubleshooting specific to the tunnel fault can be improved.