Citrix ADC appliances (MPX, VPX, SDX ADC, BLX) that are to be added to a cluster must meet the following prerequisites:

  • All appliances must have the same software version and build.
  • All appliances must be of the same platform type. This means that a cluster must have either all hardware appliances (Citrix ADC MPX) or all Citrix ADC VPX appliances, or all Citrix BLX appliances, or all Citrix SDX ADC instances.


    • For a cluster of hardware appliances (MPX), the appliances must be of the same model type.
    • For the formation of the heterogeneous cluster, all appliances must be of MPX platform type.
    • For a cluster of virtual appliances (VPX), the appliances must be deployed on the following hypervisors: XenServer, Hyper-V, VMware ESX, and KVM.
    • For setting up a cluster of SDX Citrix ADC instances, see Set up a cluster of Citrix ADC instances.
    • Jumbo frames are supported on a Citrix ADC cluster that is made up of Citrix ADC SDX instances.
    • You can create L3 clusters of SDX instances.
    • For information about setting up a Citrix ADC BLX cluster, see Citrix ADC BLX cluster.
  • Appliances can belong to different networks.

  • Be initially configured and connected to a common client-side and server-side network.

  • For a cluster of virtual appliances (Citrix ADC VPX, or Citrix ADC BLX, or Citrix SDX ADC instance), that has large configurations, it is recommended to use 6 GB RAM for each node of the cluster.

  • NetScaler VPX instances hosted on NetScaler SDX appliance must be provisioned with a dedicated core.