Rapid channel failure detection and recovery in wireless communication networks is needed in order to meet, among other things, carrier class Ethernet channel standards. Thus, resilient wireless packet communications is provided using a physical layer link aggregation protocol with a hardware-assisted rapid channel failure detection algorithm and load balancing, preferably in combination. This functionality may be implemented in a Gigabit Ethernet data access card with an engine configured accordingly. In networks with various topologies, these features may be provided in combination with their existing protocols.

A plurality of virtual internet protocol addresses for a first single network interface card of a node of a storage cluster are provided to a client. A separate connection is established between the client and the node for each of the plurality of virtual internet protocol addresses. The separate connections are utilized together in parallel to transfer data between the client and the node.

Embodiments include methods for a user equipment (UE) to perform quality of experience (QoE) measurements configured by a wireless network. Such methods include receiving, from a radio access network node (RNN) in the wireless network, a QoE measurement configuration for one or more services provided by the UE application layer. Such methods include performing application-layer QoE measurements for the one or more services according to the QoE measurement configuration and sending, to or via the RNN in accordance with QoE measurement configuration, one or more messages comprising: one or more QoE measurement reports comprising results of the QoE measurements; and network assistance information (NAI) related to one or more paths that carry data associated with the one or more services. Other embodiments include complementary methods for RNNs and measurement functions, as well as UEs, RNNs, and measurement functions configured to perform such methods.

A controller is configured to obtain traffic information of one or more tunnels in the network, where the traffic information of each tunnel is indicative of a protection type of the tunnel against failures, and provide configuration information to each network node that is a head-end node of a determined tunnel with a certain protection type according to the obtained traffic information of the determined tunnel, where the configuration information includes a bandwidth threshold and a load balancing configuration for the determined tunnel. A network node is configured to receive configuration information from the controller, and send the notification to the controller, if it is determined that the traffic of the tunnel is above the bandwidth threshold.

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.

Techniques are described for balancing traffic load for networks configured in multi-rooted tree topologies, in the presence of link failures. Maximum flows (through minimum cuts) are calculated for subgraphs that incorporate effective link capacities on links between source and destination nodes. Effective link capacities may be determined that take into account link failures, as well as sharing of current available link capacities by multiple nodes. Traffic is balanced while simultaneously fully utilizing available link capacities, even available link capacities on partially failed links (e.g., partially failed Link Aggregation Groups (LAGs)).

An aggregate port selection is received from user to bundle at least two individual data ports of the network device for single channel data transfer. The lowest common denominators of physical capabilities (speed and duplex) of selected ports on the network device is determined through an operating system. Downgraded physical capabilities of at least one of the at least two data ports are committed to match lowest common denominators of the at least two data ports. Data exchanges are conducted over the at least two ports of the network device according to LACP.

The present disclosure relates to a communication arrangement (110, 130) adapted for link aggregation of a plurality of communication links (120a, 12b, 120c). The communication arrangement (110, 130) is adapted to communicate via the plurality of communication links (120a, 120b, 120c) and comprises a traffic handling unit (112, 132) that is adapted to obtain data segments (414-417, 419-421, 423-425) to be transmitted, and to identify one or more data flows (401, 402, 403, 404) in said data segments. The traffic handling unit is adapted to attach sequence numbers, SEQ, to data segments associated with each identified data flow (401, 402, 403, 404), wherein sequence numbers are independent between data flows and to select a communication link for transmission of a data segment associated with a certain data flow (401, 402, 403, 404). The selecting comprises selecting a previous communication link that has been used for transmission of a previous data segment from said certain data flow (401, 402, 403, 404) if possible, and selecting any communication link otherwise.

This application provides a data transmission method, a device, and a network system. The method is applied to a backbone device, and the backbone device is connected to at least two access devices. After obtaining first data that needs to be sent to a first user device, the backbone device determines a first tunnel interface identifier corresponding to the first user device. The first user device is a single-homing user device. The backbone device sends, based on the first tunnel interface identifier, a first data packet including the first data to a first access device of the at least two access devices. The first access device is configured with the first tunnel interface identifier. This can optimize a data forwarding path, implement traffic optimization for the single-homing user device, and reduce traffic pressure of the network system.

In an example, a failure event is detected in a network, where the failure event is indicative of a network outage in a network device or a peer network device of an MC-LAG. The network device and the peer network device may be configured as a first VTEP in an overlay network. It may be determined that reprovisioning of virtual tunnels in the network device is incomplete. State parameters between the network device and the peer network device is synchronized. The set of virtual tunnels in the network device is provisioned based on the state parameters. After completion of provisioning of the virtual tunnels, an IP address of the first VTEP is published to underlay network devices connecting the first VTEP to a second VTEP over an underlay network. Subsequently, communication links between the MC-LAG and a host device is enabled.