Abstract: A method includes: A control plane of a network device obtains a first MAC entry, and sends the first MAC entry and a first identifier to a forwarding plane of the network device. The forwarding plane stores the first MAC entry in a first MAC table, and a state of the first MAC entry is set to a valid state. The forwarding plane changes the state of the first MAC entry to an invalid state after first preset duration elapses and when a first preset condition is met, and sets invalid duration for the first MAC entry. The first preset condition is that the forwarding plane does not receive traffic corresponding to a first MAC address within the first preset duration after storing the first MAC entry.

Abstract: A port selection method applied to a first network device and a second network device includes determining that a port status of a first port that is in the first network device and that is used for dual-homing access can switch from a first state to an UP state; receiving a port status of a second port that is in the second network device and that is used for dual-homing access; and selecting, based on the port status of the first port and the port status of the second port, a port to be switched to the UP state from the first port and the second port.

Abstract: A configuration method and a controller are provided. The configuration method is applied to a network on which detection is performed by using the two-way active measurement protocol (TWAMP), and may include: receiving, by a controller, a request packet sent by an ingress network device, where the ingress network device is a network device through which a service flow flows into the network, and the request packet includes a destination IP address of the service flow; and determining, by the controller, based on the destination IP address, that the service flow is an X2 service flow, and sending configuration information for TWAMP detection to the ingress network device and an egress network device, where the egress network device is a network device through which the service flow flows out of the network.

Abstract: A control plane (CP) device switching method includes that when a user plane (UP) device in a forwarding-control separation system detects that performance of communication between the UP device and an active CP device does not meet a normal communication condition, and performance of communication between the UP device and a standby CP device meets the normal communication condition, the UP device sends a switching request to the standby CP device. When detecting that a quantity of UP devices that each send the switching request is greater than or equal to a first quantity threshold, the standby CP device may indicate each UP device in the forwarding-control separation system to switch to the standby CP device.

Abstract: A communication method and a communications device are provided. The communication method includes: a first device receives a first BGP update packet from a second device. The first BGP update packet includes a route target and a first address family identifier. The first device determines a first route associated with the route target and the first address family identifier. The first device sends the first route to the second device.

Abstract: A first network device receives a first packet that includes an address of the second network device. The first network device sends, to the second network device, a first detection packet used to determine that a route is reachable. The first network device determines, when a response packet of the first detection packet is not received, that the route to the second network device is unreachable.

Abstract: The present application provides a passive holding device for handling a trocar and a modular surgical system. The passive holding device has a fastening device with a coupling portion. A pivoting mechanism is connected to the coupling portion via a rotary joint. The pivoting mechanism has two L-shaped branches arranged parallel to one another, each having a short leg that is connected to a long leg via a pivot joint. The short leg of the first branch is longer than the short leg of the second branch and is connected to the long leg via a rotary shaft. The trocar holder has a gripping device and has an instrument brake. A tilting brake is arranged at the coupling portion, operatively connected to the rotary joint, and a pivoting brake is arranged at the coupling portion operatively connected to at least one of the terminal pivot joints.

Abstract: A control plane (CP) device switching method includes that when a user plane (UP) device in a forwarding-control separation system detects that performance of communication between the UP device and an active CP device does not meet a normal communication condition, and performance of communication between the UP device and a standby CP device meets the normal communication condition, the UP device sends a switching request to the standby CP device. When detecting that a quantity of UP devices that each send the switching request is greater than or equal to a first quantity threshold, the standby CP device may indicate each UP device in the forwarding-control separation system to switch to the standby CP device.

Abstract: This application provides a packet sending method, device, and system, and belongs to the field of network technologies. In a scenario in which a third network device is multi-homed to a first network device and a second network device, the first network device may forward a packet to the third network device in a manner of performing load sharing with the second network device.

Abstract: An image processing method and a flexible-screen terminal are provided. The method includes: receiving a first input by a flexible-screen terminal user, the first input being used for bending the flexible-screen terminal; in response to the first input, displaying a number N of images in a first display area of the flexible-screen terminal and displaying an operational control zone in a second display area of the flexible-screen terminal; receiving a second input by the user, the second input being used for selecting a number M of target images from the number N of images; in response to the second input, displaying the number M of target images selected by the second input in the operational control zone; displaying text information of the number M of target images in the first display area.

Abstract: The present application provides a docking device, a surgical holding device having such a docking device, and a method for connecting a surgical instrument to a holding arm of a surgical holding device. The docking device has a two-part adapter device connected at a proximal end to the holding arm and at a distal end to the surgical instrument, a first adapter with an elongated portion with a longitudinal axis and a connecting body present at a distal end of the first adapter, and a first engagement element with a terminal connection surface. The adapter device has a second adapter on the shaft of the surgical instrument and an engagement element facing the terminal connection surface in the docking situation. The terminal connection surface of the first adapter is inclined at a predetermined first angle in relation to its longitudinal axis, which is in a range from 30° to 90°.

Abstract: A link fault detection method includes sending, by a first network device, data traffic to a second network device by using a plurality of first label switched paths (LSPs). The method also includes determining, by using each of the plurality of first LSPs within a preset period, whether a first link detection packet from the second network device is received. The method further includes determining an LSP of the plurality of first LSPs for which the first link detection packet is not received as a first faulty LSP. The method additionally includes calculating a first unavailability of the plurality of first LSPs based on the first faulty LSP. The method also includes triggering the plurality of first LSPs to stop transmitting the data traffic according to the first unavailability of the plurality of first LSPs.

Abstract: In a method for configuring a MAC address aging time, a first device generates a first Ethernet virtual private network EVPN protocol packet. The first EVPN protocol packet includes aging time information indicating a media access control (MAC) address aging time for an EVPN. The first device sends the first EVPN protocol packet to a second device. The second device configures the MAC address aging time based on the first EVPN protocol packet.

Abstract: A port selection method applied to a first network device and a second network device includes determining that a port status of a first port that is in the first network device and that is used for dual-homing access can switch from a first state to an UP state; receiving a port status of a second port that is in the second network device and that is used for dual-homing access; and selecting, based on the port status of the first port and the port status of the second port, a port to be switched to the UP state from the first port and the second port.

Abstract: Embodiments of this application disclose a method and apparatus for detecting a link status, and pertain to the communications field. The method includes: A first network device detects a link status of a bundled physical link. The bundled physical link is a link between the first network device and a second network device. The first network device determines N logical links based on link information about the bundled physical link. The N logical links are carried on the bundled physical link, and N is an integer greater than or equal to 1. The first network device skips detecting link statuses of the N logical links, and sets the link statuses of the N logical links to the link status of the bundled physical link. According to this application, occupied computing resources of a network device and occupied network resources of a communications network can be reduced.

Abstract: After a first broadband access server (BAS) receives a connection request of a first terminal, when a quantity of remaining session resources of the first BAS is less than or equal to a first threshold, the first BAS sends the connection request to a second BAS, so that the first terminal accesses a network via the second BAS, wherein the second BAS is determined by the first BAS by using a BAS pool communication protocol.

Abstract: This application discloses a method and apparatus for implementing entry backup. When a first network device needs to back up information about a first entry stored in the first network device to a second network device, the first network device generates a first BGP message that includes first entry information, and sends the first BGP message to the second network device, where the first BGP message is used to advertise a newly defined entry backup route to the second network device, or the first BGP message includes an extended community attribute. After receiving the first BGP message, the second network device may obtain a second entry based on the first BGP message, and store information about the second entry, where the second entry is a backup entry of the first entry.

Abstract: A method includes: A control plane of a network device obtains a first MAC entry, and sends the first MAC entry and a first identifier to a forwarding plane of the network device. The forwarding plane stores the first MAC entry in a first MAC table, and a state of the first MAC entry is set to a valid state. The forwarding plane changes the state of the first MAC entry to an invalid state after first preset duration elapses and when a first preset condition is met, and sets invalid duration for the first MAC entry. The first preset condition is that the forwarding plane does not receive traffic corresponding to a first MAC address within the first preset duration after storing the first MAC entry.

Abstract: Embodiments of this application disclose a configuration method and a controller. The configuration method is applied to a network on which detection is performed by using the TWAMP, and may include: receiving, by a controller, a request packet sent by an ingress network device, where the ingress network device is a network device through which a service flow flows into the network, and the request packet includes a destination IP address of the service flow; and determining, by the controller, based on the destination IP address, that the service flow is an X2 service flow, and sending configuration information for TWAMP detection to the ingress network device and an egress network device, where the egress network device is a network device through which the service flow flows out of the network.

Abstract: A method, a device, and a system for deferring a switchback. A first network device sends a query packet to a second network device, detects, according to the query packet, whether a route from the second network device to a destination device is available after receiving the query packet, and when it is available, the second network device sends a query response packet to the first network device in order to trigger the first network device to switch back from a secondary route to a primary route. The technical solution provided reduces a wait-to-restore time of the switchback, ensures that service data transmitted from the first network device to the second network device can be transmitted to the destination device, and facilitates smooth transmission of the service data.