New H3C Technologies

According to a method for decompression backup, a compress node compresses and forwards packets to a master decompression node for decompression; and, in response to receiving a notification indicating that a decompression capability of the master decompression node is abnormal, the compress node switches packets to be decompressed by the master decompression node to a backup decompression node with normal decompression capability for decompression to achieve backup protection of the decompression nodes, thereby avoiding problems caused by decompression ability being abnormal, such as discarding data.

The present disclosure provides a network communication method and a branch apparatus. The method is applied to a branch apparatus which communicates with a central apparatus through a public network. The method includes: receiving a public IP address sent by the central apparatus after determining that a network address translation, NAT, gateway exists between the branch apparatus and the public network, wherein the public IP address is an internet protocol, IP, address of a target interface included in a target NAT gateway; sending a probe request packet to the target interface, the probe request packet including a destination IP address, the destination IP address being different from the public IP address and in the same network segment as the public IP address; obtaining the number of network apparatuses in a forwarding path for forwarding the probe request packet based on a probe result; sending a NAT keepalive packet to the central apparatus based on a preset period, the NAT keepalive packet including a first time to live, TTL, the first TTL being a sum of the number and a first value. Implementing the method provided in the present disclosure may avoid the impact on traffic forwarding of the central apparatus caused by the NAT keepalive packets.

The present disclosure provides a packet transmission method, apparatus and device. According to the method, data packets to be sent to a wireless terminal are obtained. If a load of each wireless link is greater than a load threshold and the data packets are high-priority data packets, it is determined whether a target wireless link has been selected for the wireless terminal, if not, a target wireless link is selected from all wireless links corresponding to the wireless terminal, and the data packets and a migration message are sent to an AP corresponding to the target wireless link, so that the AP migrates, based on the migration message, low-priority data packets to other wireless links except the target wireless link for sending, and sends the data packets to the wireless terminal through the target wireless link; if yes, the data packets are sent to an AP corresponding to the target wireless link, so that the AP sends the data packets to the wireless terminal through the target wireless link. According to the technical scheme of the present disclosure, transmission interruption of high-priority data packets may be avoided, and user experience is improved.

A congestion control method and apparatus, relating to the technical field of communication and applied to a sending-end adaptor in an AI network. The method includes: determining an initial sending window corresponding to each data flow according to a credit assigned to the data flow by a receiving-end adaptor; sending data packets to the receiving-end adaptor using a packet spray manner according to the initial sending window corresponding to each data flow; detecting current congestion information of the AI network; in response to determining that the current congestion information indicates that the AI network is in a first congestion state, adjusting the initial sending window corresponding to each data flow according to the current congestion information to obtain a secondary refreshed sending window corresponding to the data flow, wherein a parameter used to characterize the first congestion state is greater than a first parameter threshold and less than a second parameter threshold; sending the data packets to the receiving-end adaptor using the packet spray manner according to the secondary refreshed sending window corresponding to each data flow. The solution can improve the bandwidth performance of the AI network.

The present application provides methods and apparatuses for implementing clock extension based on an integrated circuit bus IIC. The present application additionally provides a clock extension indication signal line between an IIC master device and a control device in a communication control system. The IIC master device sends a first notification to the control device through the clock extension indication signal line to enable clock extension, so that the control device maintains a pin of a slave device SCL in a low-level state, to suspend data transmission. In the absence of a second notification sent by the IIC master device to the control device through the clock extension indication signal line to cancel clock extension, even if the specified period of the SCL clock cycle ends, the slave device SCL pin connected to the slave device SCL will not be controlled to be in a high impedance state as it would be in the conventional IIC data transmission mechanism. Instead, the SCL pin will be maintained at a low level until the second notification is received, breaking the limitation of the existing data transmission mechanism and implementing triggering of clock extension mechanism by the IIC master device.

This application provides a packet forwarding method and apparatus. In the embodiment, a headend releases respectively to other nodes on the current path SRv6 TE Policy source path routing and a source path control probe packet, to trigger other nodes on the current path to generate a source path control table. The source path control table contains routing forwarding information that nodes on the path of the existing SRv6 TE Policy conventionally does not care about, in order to use this source path control table to mitigate risks caused by nodes on the path of the existing SRv6 TE Policy not caring about the above routing forwarding information and improve the security of the SRv6 network.

Provided are a method and a device for real-time clock synchronization, the method including: creating a configuration task, a synchronization packet task, a follow-up packet task, a delay request packet task, a delay response packet task, and a timestamp update task with the same priority and same time slice; running each task based on the time slice and in a round robin mode; generating a hardware interrupt by timing based on a clock synchronization interval; responding to a hardware interrupt of the timer hardware interrupt, identify a master port for the synchronization packet task, to record the master port with a synchronization identifier in a synchronization port table; detect a synchronization packet sending event and a delay request packet receiving event on the master port, and record synchronization packet timestamp information for updating the synchronization timestamp table and delay request packet timestamp information for updating the delay request timestamp table.

The present disclosure provides a packet transmission method and apparatus and an electronic device. The method includes: determining whether communication between an associated Access Point (AP) of an AP and a wireless terminal is abnormal; in response to a determination that the communication between the associated AP and the wireless terminal is abnormal, enabling a backup redundancy service, where a service identifier of the backup redundancy service is consistent with a service identifier of the associated AP; by the backup redundancy service, monitoring a first data packet sent by the wireless terminal to the associated AP and sending the first data packet to an Access Controller (AC); by the backup redundancy service, receiving a response data packet returned by the AC for the first data packet and sending the response data packet to the wireless terminal. In the technical solutions provided by the present disclosure, the network interruption of the wireless terminal and the transmission process interruption of the data packet can both be avoided, thereby maintaining the service uninterrupted.

Examples of the present disclosure provide a network device and a data processing method, which relates to the field of communication technology. The network device includes a FlexE interface board, a backplane and at least one forwarding board; wherein a first VLAN configuration unit is provided on the FlexE interface board, and the first VLAN configuration unit is connected to the backplane through a serializer/deserializer; a mapping relationship between FlexE service ports and FlexE channels is stored in the first VLAN configuration unit; a second VLAN configuration unit is provided on the at least one forwarding board, and the second VLAN configuration unit is connected to the backplane through a serializer/deserializer; the mapping relationship between the FlexE service ports and the FlexE channels is stored in the second VLAN configuration unit; the serializer/deserializer transmits a data frame by using an Ethernet backplane protocol. This solution can reduce a difficulty of chip selection and hardware cost of the network device and improve a scalability of the network device.

The present disclosure a packet transmission method, apparatus and device. The method includes: sending radio frequency information of a neighbor AP of the first AP to the first AP such that the first AP broadcasts a beacon packet carrying the radio frequency information of the first AP and the radio frequency information of the neighbor AP; wherein the beacon packet is configured to indicate a wireless terminal for accessing the first AP later to establish a first wireless link with the first AP based on the radio frequency information of the first AP, and establish a second wireless link with the neighbor AP based on the radio frequency information of the neighbor AP; receiving a first data packet from the first AP and a second data packet from the neighbor AP; and sending the first data packet or the second data packet. According to the present disclosure, interruption of transmission process of the data packets is avoided, thereby improving the user experience. For the reconnection process of the roam, in order to ensure roam continuity, the wireless terminal has no perception for the reconnection process, maintaining service uninterrupted.