Technology

All KEMP LoadMaster appliances include support for SDN Adaptive load balancing while KEMP 360 Central provides real-time visualization of SDN traffic paths.

SDN-Mode-Diagram

To support various application delivery scenario, SDN adaptive load balancing may be configured in one of four modes:

  • Mode 1 – If a server is on a congested port, LoadMaster reduces the volume of traffic to that server
  • Mode 2 – If a path to a server is congested, less traffic will be delivered via the congested path
  • Mode 3 – The LoadMaster reprograms SDN flows to avoid congestion on the network
  • Mode 4 – The LoadMaster dynamically creates a Quality of Service (QoS) overlay on the SDN fabric to mitigate congestion

Mode 1 and Mode 2 offer the simplest integration, where the LoadMaster gathers performance metrics from the SDN controller to determine the congestion status of the application server paths and ports. This insight on congestion allows traffic to be weighted towards servers on non-congested paths ensuring continued quality of experience for end users.

With Mode 3, LoadMaster instructs the SDN controller to create new network paths to the application servers that avoid congested parts of the network. Mode 4 offers the most deterministic control over traffic flow by adjusting the QoS of traffic going through the LoadMaster and also configuring the QoS on the underlying switch fabric via the SDN controller. This approach enables dynamic control of the north-south traffic flows to mitigate against unexpected congestion. Congestion may be caused by many factors including high-volume east-west traffic flows due to backups being performed or virtual machine migrations.

All KEMP LoadMaster appliances have integrated SDN capabilities and are available as virtual, physical and bare metal appliances. Explore the various platforms that you can purchase today to start deploying and leveraging KEMP ADC.

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