In one embodiment, a device obtains application experience metrics for an online application. The device predicts, based on the application experience metrics, future application experience metrics for each of a set of provider endpoints for the online application. The device selects, based on the future application experience metrics, a particular provider endpoint from among the set of provider endpoints. The device provides, to a Domain Name System (DNS) resolver, resolution information for one or more of the set of provider endpoints that causes a query for one of those provider endpoints to resolve to an address of the particular provider endpoint.

A sequence recovery method is executed by a node in a time-sensitive network configured to transmit and receive packets The method includes providing a state variable, having a first state in which a packet loss counter is disabled, and a second state in which the packet loss counter is enabled. The packet loss counter can only be incremented to count lost packets when the loss state variable is in the second state. This method enhances the IEEE 802.1CB standard.

A sequence recovery method is executed by a node in a time-sensitive network configured to transmit and receive packets The method includes providing a state variable, having a first state in which a packet loss counter is disabled, and a second state in which the packet loss counter is enabled. The packet loss counter can only be incremented to count lost packets when the loss state variable is in the second state. This method enhances the IEEE 802.1CB standard.

A transmission quality detection method, apparatus, and system are disclosed. A first node is configured to send a periodic packet to a second node, determine a first data volume of a target service flow transmitted by the first node in a time interval for two consecutive times of transmitting the periodic packet, and send a first statistical packet including the first data volume to the controller. The second node is configured to determine a second data volume of the target service flow transmitted by the second node in the time interval for two consecutive times of transmitting the periodic packet, and send a second statistical packet including the second data volume to the controller. The controller is configured to determine, based on the first data volume and the second data volume, transmission quality between the first node and the second node.

A method includes moving one or more transmit facility or transmit facilities attached to a first component with regard to at least two receive facilities attached at a fixed position to the second component; and at least one of registering a respective error if an error condition exists for the respective receive facility or modifying an operation of an apparatus comprising the first and a second component if the error condition exists for the respective receive facility, the error condition for the respective receive facility depends on location information relating to at least one of the position of the first component with regard to the second component or orientation of the first component with regard to the second component, and/or at least one of a measure for a receive quality of the signals or data packets received from the transmit facility or from at least one of the transmit facilities.

A method includes moving one or more transmit facility or transmit facilities attached to a first component with regard to at least two receive facilities attached at a fixed position to the second component; and at least one of registering a respective error if an error condition exists for the respective receive facility or modifying an operation of an apparatus comprising the first and a second component if the error condition exists for the respective receive facility, the error condition for the respective receive facility depends on location information relating to at least one of the position of the first component with regard to the second component or orientation of the first component with regard to the second component, and/or at least one of a measure for a receive quality of the signals or data packets received from the transmit facility or from at least one of the transmit facilities.

Some embodiments provide a method for identifying policy misconfiguration in a datacenter. Based on flow data received for a plurality of data compute nodes (DCNs) in the datacenter, the method determines that an anomalous amount of data traffic relating to a particular DCN has been dropped. The method uses (i) the received flow data for the particular DCN and (ii) a set of recent policy configuration changes to determine policy configuration changes that contributed to the anomalous amount of dropped data traffic relating to the particular DCN. The method generates an alert for presentation to a user indicating the anomalous amount of data traffic and the contributing policy configuration changes.

An example method includes recording, by a node out of a plurality of nodes, occurrence of one or more baseline node events, generating a statistical data corresponding to a recorded occurrence of the one or more baseline node events over a pre-determined period, comparing one or more subsequent node events with the statistical data, and communicating data corresponding to the one or more subsequent node events to the central control device, in response to determining that the one or more subsequent node events satisfy the event deviation threshold.

This application provides example detection block sending and receiving methods, and network devices and systems. One example detection block sending method includes obtaining, by a network device, an original bit block data flow. At least one detection block is generated, and the at least one detection block is inserted into a position of at least one idle block in the original bit block data flow. The bit block data flow including the at least one detection block is then sent.

This application provides example detection block sending and receiving methods, and network devices and systems. One example detection block sending method includes obtaining, by a network device, an original bit block data flow. At least one detection block is generated, and the at least one detection block is inserted into a position of at least one idle block in the original bit block data flow. The bit block data flow including the at least one detection block is then sent.