Abstract: The present disclosure discloses a method for multi-homing path selection of a stream control transmission protocol (SCTP). The method includes the following steps of: starting quality evaluation of paths; calculating a quality evaluation value of each path; comparing the quality evaluation value of each path; and selecting a path with the highest quality evaluation value to transmit a data message. The present disclosure also discloses an apparatus for multi-homing path selection of an SCTP. By adopting the method and the apparatus, a network selects the path with the highest quality evaluation value to transmit a data message. As long as path faults affect the transmission efficiency, other path with better quality is selected for transmission, thus the capability of the network of dealing with all kinds of path faults can be improved, and the data transmission speed and quality are further improved.

Abstract: Provided is a dual port Ethernet communication device which allows data received via any one communication port to be bypassed to other communication port. Since the Ethernet communication device performs such bypass operation itself, the communication data can be kept transferred to other terminal unit even though the terminal unit equipped with the Ethernet communication device does not operate normally due to causes such as a break down. In particular, if it is used in each terminal unit forming a closed loop in a closed loop power system, the communication on the closed loop remains such that the adjacent terminal unit can perform backup interrupt function even though a failure happens in a specific terminal unit forming the closed loop.

Abstract: A method, apparatus and computer program product for performing routed split multilink trunking for IPv6 is presented. A first aggregation device is interconnected with a second aggregation device using an Inter Switch Trunk (IST). The first aggregation device learns a Media Access control (MAC) address of the second aggregation device and the second aggregation device learns a MAC address of the first aggregation device. Internet Protocol Version 6 (IPv6) addresses are synchronized between the first aggregation device and the second aggregation device. When the first or second aggregation device receives an IPv6 packet destined to the other aggregation device, the first or second aggregation device performs an IPv6 route lookup on a destination address of the IPv6 packet and forwards the packet to a next hop for the IPv6 packet.

Abstract: A transmission system includes a transmission device and a reception device connected with each other via two lines. When the transmission device switches a line, used for transmitting VLAN traffic, from a first line to a second line, the transmission device transmits the VLAN traffic to the second line by switching the line after transmitting a post-switching message to the first line. The reception device includes a first buffer which stores the VLAN traffic received from the first line and a second buffer which stores the VLAN traffic received from the second line. When the reception device receives the post-switching message from the first line, the reception device starts reading of the VLAN traffic from the second buffer after reading the entire VLAN traffic stored in the first buffer.

Abstract: SMS-C's and associated methods are disclosed that attempt to deliver SMS messages over a broadband data network as opposed to a voice network. An SMS-C described herein stores session information for a mobile device that has established a data session over the broadband data network. When the SMS-C receives a Mobile Terminated (MT) SMS message destined for the mobile device, the SMS-C stores the SMS message for delivery. The SMS-C then identifies a routing address for the mobile device over the broadband data network based on the stored session information, and forwards the SMS message to the mobile device directly over the broadband data network based on the routing address.

Abstract: The time required for a path recalculation and a path switching upon occurrence of a failure is shortened. A path generation unit of a transport control server (TCS) S-1 generates the normal path information in accordance with the topology information of a network and the resource information which are set. Also, the path generation unit generates in advance the backup path information for occurrence of the failure based on the prediction topology information and the prediction resource information which have been modified in accordance with a predicted failure position. A path information notification unit of the TCS (S-1) notifies nodes N of the generated normal path information. A failure information acquisition unit of the TCS (S-1) detects the occurrence of the failure. If the occurrence of the failure is detected, the path information notification unit notifies the nodes N of the backup path information that is stored.

Abstract: A method and apparatus is disclosed for providing gateway anycast virtual MAC reachability in extended subnets. When an extended L2 subnet spans more than one geographical location, it is desirable that the gateway MAC addresses learned in each location be the same across all IP hosts. Accordingly, the gateway MAC address may be preserved (i.e., programmed) in more than one port on a bridge, such as both a local port and a LAN extension port. The bridge may forward traffic having the anycast MAC address to the closest instance of the MAC address, rather than replicating the traffic to the multiple ports on which the anycast MAC address is programmed. If the gateway reachable on the local port goes down, the frame may be forwarded to the local gateway in the second layer 2 subnet over the LAN extension port.

Abstract: An approach is provided for notifying a change in path condition. A change in condition of a label switched path connecting a first node and second node is detected. A notification message is generated for transmission to the first node. The notification message specifies information related to the detected change according to a predetermined format that can be processed by the first node.

Abstract: In a multi-protocol label system (MPLS) carrying data, a working path carries data from a starting point or node to a destination point or node via a working path. The working path includes the switches and physical media linking starting point and the destination point. MPLS system reliability is enhanced by way of a protection path, over which data can be carried from the starting point to the destination point upon a detected failure along the working path. Upstream messages inform one or more MPLS switching systems to make a switchover from a working path to a protection path.

Abstract: Various embodiments provide a method and apparatus of providing a non-overlapping ring-mesh network topology which reduces costs (e.g., the number of network links) while providing resiliency to failure and meeting QoS requirements (e.g., network delay attributed to traversing the network architecture). In particular, a set of target nodes belonging to a cluster are connected through N rings. Each node is member of all N rings and no link between nodes in a ring is duplicated in another ring.

Abstract: A method is provided in one example embodiment and includes receiving a first pseudo-node identifier associated with a first network node via a network. The first pseudo-node identifier is generated by the first network node in a first designated intermediate system (DIS) operation. The method further includes detecting a loss of connectivity to the first network node, and receiving a second pseudo-node identifier associated with a second network node via the network. The second pseudo-node identifier is generated by the second network node in a second DIS operation. The method further includes executing a first network path determination operation using the first pseudo-node identifier and the second pseudo-node identifier when an elapsed time between the detecting of the loss of connectivity with the first network node and the executing of the first network path determination operation is within a predetermined threshold.

Abstract: The present invention relates to a method and device for maintaining the context of user equipment (UE) in a wireless communication system. If power for a terminal is abnormally down, a base station receives an abnormal power down report and a request for maintaining the context of the terminal from the terminal, determines whether to maintain the context of the terminal, and transmits, to the terminal, an abnormal power down confirmation that indicates whether to maintain the context of the terminal.

Abstract: A system and method for selecting MPLS network transport entities between a first endpoint and a second endpoint are presented. Working and protection entities are selected from a set of available entities based upon minimizing the probability of simultaneous failure and/or minimizing a cost function base upon one or more metrics.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for semi-centralized routing. In one aspect, a computer-implemented method receives a network protocol packet at a router adapted for routing data packets to one or more additional routers. The network protocol packet conforms to a routing protocol that provides distributed routing computation. The method also sends the network protocol packet, through a controller, to a selected one of a plurality of route control servers. The method also processes the network control packet at the selected route control server to generate a routing computation result that conforms to the routing protocol. The method also generates routing information based on the routing computation. The routing information conforms to a control protocol that provides centralized routing computation. The method also sends the routing information to the router for routing of data packets based on the control protocol.

Abstract: System(s) and method(s) are provided for forward handover under radio link failure. A configurable criterion for radio link failure (RLF) is established through a reference threshold for a channel quality metric; the threshold (CQITH) can be determined at least on a quality-of-service basis or a per-terminal basis. A low-overhead indication of RLF is conveyed as a NULL CQI when the channel quality metric is below threshold. Onset of RLF triggers preparation of forward handover (FHO) at a terminal within a predetermined timer, during which normal service can resume if link quality recovers above CQITH. Forward handover is pursued once timer elapses. Preparation at the terminal can be complemented by preparation implemented in advanced to RLF condition, in accordance to a disparate threshold applied to terminal's measurements. Preparation of FHO includes backhaul exchange of operational information like buffered data, and context.

Abstract: A network switch apparatus includes a first network port, a second network port, a first inline port, a second inline port, wherein the first and second inline ports are for communication with a pass-through device, a packet switch, and a by-pass device configured to operate in a first mode of operation, wherein in the first mode of operation, the by-pass device is configured to pass a first packet received at the first network port to the packet switch. The by-pass device is configured to switch from the first mode of operation to a second mode of operation upon an occurrence of a condition, and wherein in the second mode of operation, the by-pass device is configured to transmit a second packet received at the first network port to the second network port without passing the second packet to the packet switch.

Abstract: In general, techniques are described for dynamically scheduling and establishing paths in a multi-layer, multi-topology network to provide dynamic network resource allocation and support packet flow steering along paths prescribed at any layer or combination of layers of the network. In one example, a multi-topology path computation element (PCE) accepts requests from client applications for dedicated paths. The PCE receives topology information from network devices and attempts to identify paths through a layer or combination of layers of the network that can be established at the requested time in view of the specifications requested for the dedicated paths and the anticipated bandwidth/capacity available in the network. The PCE schedules the identified paths through the one or more layers of the network to carry traffic for the requested paths. At the scheduled times, the PCE programs path forwarding information into network nodes to establish the scheduled paths.

Abstract: Calculating routing after switching occurs from a primary main control board to a standby main control board in a Fiber Channel (FC) switch includes receiving neighbor Link State Records (LSRs) sent by the primary main control board and backing up the neighbor LSRs on the standby main control board. The standby main control board is triggered to be promoted to the primary main control board, and an adjacency relationship is established with neighbors according to the backed up neighbor LSRs. LSRs of the switch are generated based on available ports on the switch and the neighbors, and a message is sent for maintaining the adjacency relationship to the neighbors with which the adjacency relationship has been established. Routing is calculated based on the neighbor LSRs and the LSRs of the switch.

Abstract: Optical network protection devices and protection methods including: a working line; a protection line; a determination module configured to determine the protection type of optical network; a first judgment module configured to judge whether the working line is normal according to performance parameter values of service signal in the working line and switching conditions configured for multiplexing section protection when the protection type of optical network is the multiplexing section protection; a second judgment module, configured to judge whether the working line is normal according to performance parameter values of service signal in the working line and switching conditions configured for channel section protection when the protection type of optical network is the channel section protection; a switching module, configured to take the service signal in the protection line as an output signal when working line is abnormal.

Abstract: A system and method for traffic polarization during failures includes a communication network cluster including a first network switching unit configured to communicate with a first network node via a first network link and a second network node via a second network link, a second network switching unit configured to communicate with the first network node via a third network link and the second network node via a fourth network link, and a first intra-cluster link coupling the first network switching unit to the second network switching unit. The second network switching unit is further configured to respond to a failure in the fourth network link by broadcasting a route withdrawal message to the first network switching unit and the first network node. The first network switching unit is configured to accept rerouted network traffic from the first network node via the first network link resulting from the route withdrawal message.

Abstract: An overlay network node is arranged to provide robust reply routing for requests and replies travelling over the network. Each node comprises first means which forwards each request originating in a source node and destined for destination node. The node comprises second means which redirect replies if the node from which the corresponding requests were received is no long accessible. The reply is, for example, turned into a request containing the reply as its payload and is returned towards the source node according to the rules used for forwarding the requests.

Abstract: A method and network for determining an interconnect node for establishing a forwarding path for service based data within a network system. The method includes assigning, interconnect node status information to network interconnect nodes, wherein a network interconnect node to which a passive status is assigned is only allowed to transmit service based data between an external link and another interconnect node of the network, or between two other interconnect nodes of the network. Only a network interconnect node with active status is allowed to send or receive service based data to or from the network. The method includes determining, for a given service, an interconnect node with active status for establishment of a forwarding path including the interconnect node with active status and an external link, wherein the determination is based on the respective status information assigned to the network interconnect nodes for the service.

Abstract: A method, apparatus and computer program product for providing failover for a point to point tunnel for wireless local area network split-plane environments is presented. A second network switch learns first data associated with a third network switch and the second network switch terminates a tunnel. The third network switch learns second data associated with the second network switch. The first and second data are synchronized between the second network switch and the third network switch. The second network switch and the third network switch load sharing tunnel data packets. The third network switch forwards tunnel control packets received by the third network switch to the second network switch. A failure relating to the second network switch is detected and a new tunnel is established with the third network switch.

Abstract: A Fiber Channel (FC) switch and related methods are provided for merging the FC switch with an existing FC network. During a merge process of a stand-alone switch with an FC network, a first Exchange Fabric Parameters (EFP) frame is sent from the stand-alone switch to an FC switch in the existing FC network. The first EFP frame has an empty domain identifier (ID) list. The stand-alone switch receives a second EFP frame from the FC switch. The second EFP frame contains a domain ID list of domain IDs already in use in the FC network. The stand-alone switch compares the domain ID list in the second EFP frame with a stored list of one or more domain IDs associated with the stand-alone switch to determine if there is a domain ID overlap or conflict. If no conflict is detected, the stand-alone switch merges with the existing network without initiating a Build Fabric phase or a Principal Switch Selection phase that could cause disruption of traffic in the network.

Abstract: In a method for routing packets between a plurality of switches in a computer network, in which paths between the plurality of switches are identified as a plurality of virtual local area networks (VLANs) stored in a balancing table, a packet to be routed from a source switch to a destination switch is received. In addition, a VLAN is selected from the plurality of VLANs in the balancing table to route the packet through the computer network and the packet is routed through the selected VLAN.

Abstract: A packet transmitting apparatus according to the present invention includes a plurality of ports. When the same unlearned packets have arrived at the plurality of ports, the packet transmitting apparatus judges through packet processing section that the first arrived one of the packets is a previous arrival packet. Then, through previous arrival group judging section, the packet transmitting apparatus selects from the plurality of ports a plurality of ports satisfying a previous arrival port condition for determining a port at which the previous arrival packet arrives as a previous arrival port. The packet transmitting apparatus judges the thus selected plurality of ports as the previous arrival ports having an equal previous arrival characteristic of packets, and includes the ports in a previous arrival port group.

Abstract: The disclosed embodiments relate to a system and method for compensating for a satellite gateway failure. There is provided a system comprising a first satellite gateway, and a second satellite gateway (14) coupled to the first satellite gateway and configured to automatically redistribute transponders assigned to the first satellite gateway to create a new transponder allocation if the first satellite gateway fails.

Abstract: The present disclosure is directed to an apparatus and method for providing service to a residential gateway. The method includes detecting a service disruption associated with a first connection to a first residential gateway device. In response to the detected service disruption, a second residential gateway device selected at the first residential gateway may be used to establish a second connection to the first residential gateway device.

Abstract: The subject matter described herein includes methods, systems and computer readable media for automatic, peer node transparent re-homing of time division multiplexed (TDM)-based signaling channels in an X user adaptation (XUA) signaling gateway. One exemplary method includes providing an XUA Signaling Gateway (SG) having a plurality of Signaling Gateway (SG) cards, a plurality of TDM network interface cards (NICs) and a plurality of packet NICs, and a switching matrix connecting the TDM NICs and the XUA SG cards. The method further includes configuring the switching matrix so that a first XUA SG card terminates a set of TDM-based signaling channels. The method further includes switching the set of TDM-based signaling channels from one of the TDM NICs to the first XUA SG card.

Abstract: Endpoint-based parallel data processing in a parallel active messaging interface (‘PAMI’) of a parallel computer, the PAMI composed of data communications endpoints, each endpoint including a specification of data communications parameters for a thread of execution on a compute node, including specifications of a client, a context, and a task, the compute nodes coupled for data communications through the PAMI, including establishing a data communications geometry, the geometry specifying, for tasks representing processes of execution of the parallel application, a set of endpoints that are used in collective operations of the PAMI including a plurality of endpoints for one of the tasks; receiving in endpoints of the geometry an instruction for a collective operation; and executing the instruction for a collective operation through the endpoints in dependence upon the geometry, including dividing data communications operations among the plurality of endpoints for one of the tasks.

Abstract: An uplink signal processing system and method of operating the same includes a primary signal processing circuit generating a primary output signal and a secondary signal processing circuit generating a secondary output signal. The uplink signal processing system includes a switch communicating with the primary signal processing circuit and the secondary signal processing circuit. A monitoring and control system monitors the primary signal processing circuit and the secondary signal processing circuit and generates a monitoring signal and controlling the switch to switch from the primary signal processing circuit to the secondary signal processing circuit in response to the monitoring signal. The switch forms an output signal in response to switching.

Abstract: A control apparatus comprises: a switch extraction unit extracting a second switch adjacent to a first switch that stops in a communication system including a plurality of switches having a predetermined topology; a flow extraction unit extracting a flow transferred to the first switch after the second switch from a plurality of flows passing through the communication system; a path determination unit determining, assuming that, among the plurality of switches, switches located at start and end nodes of the flow are third and fourth switches, respectively, a path from the second switch to the fourth switch, based on a topology obtained by excluding the first switch from the predetermined topology; and a path generation unit connecting a path from the third switch to the second switch in an initial path of the flow and a path determined by the path determination unit to generate a new path of the flow.

Abstract: System, methods, and networks are disclosed that allow base station systems of a wireless communication network to transmit outgoing traffic over a packet backhaul network to multiple routing elements on the MSC side of the network. A base station system described herein identifies a primary routing element and a backup routing element. The primary routing element is the device to which the base station system transmits outgoing traffic under normal operation, and the backup routing element is an alternate to the primary routing element. To transmit traffic over the packet backhaul network, the base station system monitors the availability of the primary routing element. If the primary routing element is available, then the base station system transmits outgoing traffic over the packet backhaul network to the primary routing element. If unavailable, then the base station system transmits outgoing traffic over the packet backhaul network to the backup routing element.

Abstract: In a telecommunications/data network, it is common to have multiple recovery domains each employing its own technique for recovering a fault that may be different from a technique employed by another domain. Permitting multiple recovery domains to recover a fault without coordination among the domains can result in adverse interactions, such as rapid and repeated changes in the actions taken or “flapping,” and repeated hits to traffic. A method and corresponding apparatus for coordinating fault recovery in a network, according to an embodiment of the present invention, notifies a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network. Coordinating the recovery efforts of the first and second recovery domains reduces fault recovery time and allows concurrent actions to be taken.

Abstract: A method of routing packets across a packet switched network domain, comprising a multiplicity of nodes. Each node comprises an ingress interface and an egress interface. For each destination node a default and a detour branching are defined, each specifying a route to the destination node. For each two-edge connected node the default and detour branchings do not share a common ingress interface.

Abstract: The protection of multi-segment pseudowires by utilizing backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a backup path is chosen, and reachability information associated with the chosen backup path is signaled across the backup path before reverse traffic is switched to the backup path. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire.

Abstract: Devices, systems, and methods for sending and processing session initiation protocol (SIP) responses are disclosed. According to one aspect, a method for sending an SIP response through a first telecommunications network node is described. The method includes receiving, by means of the first node, a SIP request sent by means of a second node of the network. The method includes detecting an event that interferes with processing of said request by means of the first node. The method further includes sending, to the second node, a SIP response notifying said interference. The method also includes, before the sending step, activating, within the SIP response, a parameter that allows the request to be rerouted, said parameter being configurable by means of the second node.

Abstract: According to an example, a traffic management method includes that an edge device of a data center site receives first-hop gateway information of at least one remote data center sites from an edge device of the at least one remote data center site, checks whether a local first-hop gateway has failed, and in response to the local first-hop gateway being determined as having failed, transmits a packet originating within the data center site and addressed to the local first hop gateway to an edge device of a remote data center site.

Abstract: A structure and a first panel are operably disposed with respect to the structure. A first plurality of nodes is disposed within the first panel, including a first plurality of power distribution network nodes in a first power distribution network, and wherein the first plurality of nodes further comprises a first group of nodes. A second panel is operably disposed with respect to the structure. A second plurality of nodes is disposed within the second panel, including a second plurality of power distribution network nodes in a second power distribution network isolated from the first power distribution network. The second plurality of nodes further comprises a second group of nodes. A bus guardian, separate from the two panels, electrically connects the first panel and the second panel. The bus guardian is configured to network the first group of nodes and the second group of nodes in a network.

Abstract: A method, system and device for recovering services are provided, which relate to the field of communication. The method includes the following steps. Working resources of a Traffic Engineering (TE) link in a network are set to a shared MESH recovery state, and information of the shared MESH recovery state is flooded into the network, in which the information of the shared MESH recovery state is used to broadcast that the failure recovery mode of the working resources of the TE link is a band-level shared MESH recovery mode; whether the TE link fails is detected; and when detecting that the TE link fails, services on the working resources of the TE link are recovered by switching the N band-level FA LSPs on the TE link to the corresponding N band-level shared MESH recovery paths. The technical solutions reduce service recovery time and satisfy service requirements of customers while increasing bandwidth resource usage rate.

Abstract: In a switching network, each of a plurality of lower tier entities is coupled to each of multiple master switches at an upper tier by a respective one of multiple links. At each of the multiple master switches, a plurality of virtual ports each corresponding to a respective one of a plurality of remote physical interfaces (RPIs) at the lower tier are implemented on each of a plurality of ports. Each of the plurality of lower tier entities implements a respective egress port mapping indicating which of its plurality of RPIs transmits egress data traffic through each of its multiple links to the multiple master switches. In response to failure of one of the multiple links coupling a particular lower tier entity to a particular master switch, the particular lower tier entity updates its egress port mapping to redirect egress data traffic to another of the multiple master switches without packet dropping.

Abstract: It is presented a method, executed in a root sequence determiner for a base station controlling a first cell, the first cell being associated with at least one root sequence used for cell differentiation on a random access channel. The method comprises the steps of: obtaining information on root sequences of neighbouring cells; when a root sequence conflict is found between the first cell and a neighbouring cell, here denoted a conflict cell, determining if the conflict cell is of a higher priority than the first cell, the priorities of the first cell and the conflict cell being based on properties of the respective cells; and when the conflict cell is of a higher priority than the first cell, finding a new root sequence for the first cell, avoiding the root sequences of the neighbouring cells.

Abstract: A method and circuit for implementing lane shuffle for fault-tolerant communication links, and a design structure on which the subject circuit resides are provided. Shuffle hardware logic steers a set of virtual data lanes onto a set of physical optical lanes, steering around all lanes that are detected as bad during link initialization training. A mask status register is loaded with a mask of lane fail information during link training, which flags the bad lanes, if any. The shuffle hardware logic uses a shift template, where each position in the starting template is a value representing the corresponding lane position. The shift template is cascaded through a set of shifters controlled by the fail mask.

Abstract: The invention concerns a method of providing a successor list (L) for routing in a peer-to-peer overlay network (N), and a network node and a computer program product to execute this method. The peer-to-peer overlay network (N) comprises a plurality of nodes (0, 20, 50, 87, 112, 140, 179, 200, 211, 223, 240). The successor list (L) specifies identifiers of at least two successor nodes (211, 223) subsequently succeeding a first node (200) of the plurality of nodes (0, 20, 50, 87, 112, 140, 179, 200, 211, 223, 240) with regard to a topology structure of the peer-to-peer overlay network. It is determined whether the at least two successor nodes (211, 223) listed in the successor list (L) run on the same physical hardware.

Abstract: A system and method for switching between receiver and decoder circuits includes a first receiver receiving a first channel signal and forming a first channel signal, a second receiver receiving the first channel signal and forming a second channel signal and a monitoring system monitoring the first channel signal and the second channel signal and generating a monitoring signal. The system also includes a transfer switch in communication with the first channel signal and the second channel signal. The monitoring system controls the switching of the transfer switch from the first signal to the second signal in response to the monitoring signal. The transfer switch forms a switch output signal.

Abstract: Techniques are described for forwarding packets in a VPLS using multi-homing PE routers configured in an “active-active” link topology. A router includes a control unit that forms a customer-facing multi-chassis link aggregation group (LAG) to include a plurality of active access links that couple the router and a second router to a multi-homed customer site associated with the VPLS domain. The control unit also forms a core-facing multi-chassis LAG within the VPLS domain to include a plurality of pseudowires that connect the router and other member routers of the core-facing LAG to a common remote router of the VPLS domain. The router receives layer two (L2) packets from the multi-homed customer site on one or more of the active access links and forwards the L2 packets to the remote router over one or more of the pseudowires using the core-facing multi-chassis LAG.

Abstract: Methods, systems, and apparatus, are provided for wireless networking. In some implementations, a self-configuring wireless system includes one or more wireless network devices; a primary access point device; and a secondary access point device; wherein the primary access point device and the at least one wireless network device are preconfigured with a respective key so as to enable the primary access point device to establish a secure wireless network with the at least one network device using the respective keys, and wherein the secondary access point device is configured assume coordination for the self-configuring wireless system if a fault associated with the primary access point device occurs.

Abstract: A connection oriented communications network has a plurality of nodes including a plurality of edge nodes. The network is arranged to define a primary tunnel connecting a primary one of the edge nodes to another edge node and a secondary tunnel connecting a secondary one of the edge nodes to another edge node. The network is arranged to enable switching of traffic from the primary tunnel to the secondary tunnel in the event of detection of a failure in the primary tunnel.

Abstract: A communication system comprises a plurality of DSL links comprising a first group and second group of DSL links, each group comprising more than one DSL link. The communication system also comprises a first node and a second node each having at least one application port and a plurality of DSL ports. Each DSL port is coupled to a respective one of the DSL links such that the first and second nodes are communicatively coupled via the DSL links. Each of the first and second nodes is configured to interleave a first copy of data received over the respective application port across the first group and to interleave a second copy of the data across the second group. When a failure is detected on a DSL link in the first group, each of the first and second nodes is configured to switch from the first group to the second group.

Abstract: Virtual switch interconnect for hybrid enterprise servers including a system for network configuration. The system includes a first processor coupled to a second processor via a network. The network includes a plurality of switches and links between the switches to offload processing from the first processor to the second processor. The switches include at least one virtual switch. The first processor is configured to perform a method that includes receiving network configuration data and switch state information for the network. It is detected that a first link and a second link provide two different paths between two of the switches. The first link is selected, at the computer, as a primary link based on contents of the network configuration data. The second link is deactivated in response to the selecting.