In one embodiment, a method for load balancing in a software-define networking (SDN) system includes, upon receiving a packet, determining whether a matching entry for the packet in a server distribution table contains both a current and new server selection. If the matching entry contains both, it is determined whether there is a matching entry for the packet in a transient flow table, where the transient flow table maintains server selections when at least one of the plurality of servers is reconfigured. Upon determining that there is no matching entry for the packet in the transient flow table, the method determines whether the packet is a first packet of a traffic flow. If the packet is the first packet of a traffic flow, the packet is forwarded according to the new server selection of the matching entry in the server distribution table, and the transient flow table is updated.

Method and system for load balancing in a software-defined networking (sdn) system upon server reconfiguration

An example method is provided in one example embodiment and may include configuring a measurement indication for a packet; forwarding the packet through a service chain comprising one or more service functions; recording measurement information for the packet as it is forwarded through the service chain; and managing capacity for the service chain based, at least in part, on the measurement information. In some cases, the method can include determining end-to-end measurement information for the service chain using the recorded measurement information. In some cases, managing capacity for the service chain can further include identifying a particular service function as a bottleneck service function for the service chain; and increasing capacity for the bottleneck service. In various instances, increasing capacity for the bottleneck service can include at least one of: instantiating additional instances of the bottleneck service; and instantiating additional instances of the service chain.

System and method for managing chained services in a network environment

In some examples, a method includes: providing, by a centralized network control (CNC) system, a software interface to receive service requests for configuration of services within an edge network of one or more network data centers that are controlled by the CNC system; receiving a service request to configure a service within the edge network; generating a service definition that specifies service requirements to implement the service; determining at least one network field unit that is capable of servicing the service request; and sending, to the at least one network field unit, the service definition to configure the service at the portion of the edge network.

Centralized network control for a cloud-based services exchange

Methods for delay measurement in a software-defined networking (SDN) system are disclosed. In one embodiment, one packet each is received from a first and a second network device. The time stamps of these packets are recorded in a set of ingress time stamps and a set of egress time stamps respectively if the first and second network devices are the ingress and egress network devices of a traffic flow and if both packets include indications for delay measurement. Then the method continues with a delay measure for the traffic flow based on at least the sets of the ingress time stamps and egress time stamps associated with the flow identifier of the traffic flow, and a measurement noise the electronic device obtained from sending measurement packets to the first and second network devices.

Method and system for delay measurement of a traffic flow in a software-defined networking (sdn) system

Techniques are described for extending a two-way active measurement protocol (TWAMP) to enable measurement of service key performance indicators (KPIs) in a software defined network (SDN) and network function virtualization (NFV) architecture. The TWAMP extensions enable control messaging to be handled by a TWAMP control client executed on a centralized controller, and data messaging to be handled by a TWAMP session initiator executed on a separate network device. Techniques are also described for extending TWAMP to enable measurement of any of a plurality of service KPIs for a given service supported at a TWAMP server. The service KPIs may include one or more of keepalive measurements, round trip time measurements, path delay measurements, service latency measurements, or service load measurements. The TWAMP extensions for the service KPIs may be used in both conventional network architectures and in SDN and NFV architectures.

Monitoring services key performance indicators using twamp for sdn and nfv architectures

A method for path monitoring is disclosed. The method includes receiving, at the network device, a packet from a SDN controller to monitor a path for a service between the network device and another network device. The method includes sending the packet to at least a first and a second port, where a first instance of the packet is transmitted to the first port to the other network device to monitor the path, and a second instance is transmitted to the second port that loops back the second instance to the network device at a transmission interval so that the packet is sent to the first port repetitively at the transmission interval. The method also includes determining whether or not the packet is received from the other network device within a timeout interval and discarding the packet upon determination that the packet is received within the timeout interval.

Method and system for path monitoring in a software-defined networking (sdn) system

In one embodiment, a packet from a SDN controller is received at a network device. The packet is processed according to a flow table, which contains at least two entries that each matches the packet. The entries contain instructions to forward the packet according to group tables, and the entries are to expire after different time durations. The packet is to be forwarded according to a first group table and gets duplicated into two: one is transmitted to a first packet queue that transmits packets in a fixed interval to a loopback port that loops back the packets, while the other is forwarded to a first packet buffer that randomly drops packets at a probability prior to transmitting the remaining packets to generate a traffic pattern. The packet is received from the loopback port, and then forwarded according to a second group table to generate another traffic pattern.

Method and system for traffic pattern generation in a software-defined networking (sdn) system

A method and system are implemented by a controller in a software defined networking (SDN) network. The SDN network includes a set of nodes. The controller is in communication with a server providing information about environmental events affecting the SDN network. The method includes receiving information about an environmental event affecting the SDN network, identifying a subset of the nodes in the SDN network affected by the environmental event based on location information for the subset of nodes, determining a degree of impact caused by the environmental event for each node in the subset of nodes, and configuring the SDN network to diminish an impact of the environmental event on the SDN network performance.

Method for pro-active traffic redirection in multi-hop wireless networks using software defined networking

A method in a computing device for locality sensitive load balancing between servers includes receiving a packet and querying a plurality of Bloom filters, using keys based upon a plurality of header field values of the packet, to generate a plurality of candidate servers. A subset of the candidate servers were generated due to false positive matches occurring from some of the plurality of Bloom filters. One server of the plurality of servers is identified as the destination for the packet based upon identifying the subset of candidate servers within an entry of a false positive table. Each false positive table entry identifies, for a flow of packets, servers that are falsely included in sets of candidate servers generated by the plurality of Bloom filters for packets of that flow. The packet is transmitted to the first server.

Vinayak Joshi

Papers

Method and system for delay measurement of a traffic flow in a software-defined networking (sdn) system

Method and system for path monitoring in a software-defined networking (sdn) system

Method and system for traffic pattern generation in a software-defined networking (sdn) system

Method for pro-active traffic redirection in multi-hop wireless networks using software defined networking

Method and apparatus for locality sensitive hash-based load balancing