In one embodiment, network metrics are collected and analyzed in a network having nodes interconnected by communication links. Then, it is predicted whether a network element failure is relatively likely to occur based on the collected and analyzed network metrics. In response to predicting that a network element failure is relatively likely to occur, traffic in the network is rerouted in order to avoid the network element failure before it is likely to occur.

Exemplary methods include generating a first fast reroute (FRR) next hop (NH) comprising of a first primary next hop (PNH), a first secondary next hop (SNH), and a first attribute, wherein the first PNH and first SNH include forwarding information that causes traffic to be forwarded towards a second and third network device, respectively. The methods include sending a first request to a forwarding plane to generate a second FRR NH comprising of a second PNH, a second SNH, and a second attribute. The methods include updating contents of the first FRR NH, and sending a second request to the forwarding plane to update the second FRR NH, wherein the second request causes the forwarding plane to determine whether to revert back to using the second PNH based on whether the first attribute included in the second request is different from the second attribute of the second FRR NH.

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.

The present application is directed to a computer-implemented device for reserving a path in a network. The device includes a non-transitory memory operably coupled to a processor. The processor is configured to perform the instruction of sending a path computation request to a backbone router via a routing protocol path. The processor is also configured to perform the instruction of receiving a computation reply from the backbone router path based upon the request. The processor is also configured to perform the instruction of assigning a soft cell on the path between the source and the destination device. The application is also directed to a computer-implemented device for reserving a path between a source device and destination device.

A system and method for optimized stream management are provided. The method includes retrieving priority data; determining, in real-time, a current priority tree based on the retrieved priority data, wherein the priority tree includes at least one node representing a stream; identifying, based on the retrieved priority data, at least one relative weight of the at least one node; determining an effective weight based on each identified relative weight; and filling a buffer based on the current priority tree and the at least one effective weight.

According to one embodiment, a method of performing a re-establishment procedure in a mobile communication system includes: receiving at least one packet data convergence protocol (PDCP) control plane data unit; performing an integrity check on the at least one PDCP control plane data unit; identifying an integrity check failure with regard to the at least one PDCP control plane data unit; and performing a re-establishment procedure if the integrity check failure is identified to exist with regard to the at least one PDCP control plane data unit.

A transport network employs dual homing to an access network to provide connectivity from multiple network switches. Dual homing is a mechanism by which an access network employs pair of switches in the transport network as if it were connecting to a single device. Conventional arrangements for defining multiple paths from a transport network to an access network suffer from the shortcomings of potential routing loops, increased hops to the access network, and inability or inconsistency with forwarding to different types of access networks, and may involve redirecting traffic absent faults in the access network. The dual homed network switches identify the type of access network and perform switching logic corresponding to the access network type to provide comprehensive dual-homed support to the access network independently of the type of transport employed in the access network, and employ redirection only if there is a fault in the access network.

A method supporting a distributed resilient network interconnect (DRNI) in a link aggregation group at a network device is disclosed. The method starts with receiving a distributed relay control protocol data unit (DRCPDU), where the DRCPDU includes neighbor network device's state information and configuration information, wherein the configuration information includes its operational aggregation key, gateway digest, port digest. The method continue with determine whether or not the received configuration information is different from the one of the network device and how, and causing the next DRCPDU to be transmitted to the neighbor network device to include or not include certain information accordingly.

A communication control method to be executed by a communication device, includes: transmitting, to one or more communication devices coupled to the communication device, a packet in which a destination is set; and determining, based on the number of paths that are among paths extending through the one or more communication devices to the destination and through which a response to the packet is received from the destination, the number of times of retransmission in the transmission of another packet to the destination.

Systems and methods for L2 Ethernet resilient hand-off include an access network configured between a first end point and a second end point, a first communication path and a second communication path for data flow between the first end point and the second end point, wherein the first communication path is active and the second communication path is inactive, and if a fault is detected in the first communication path, logic configured to activate the second communication path and perform a resilient hand-off of the data flow from the first communication path to the second communication path.