The HCX appliance supports extending networks from VMware vSphere Distributed Switch and NSX overlay networks.

The following information and requirements apply when extending networks:

  • Requirements in deployments using NSX for vSphere at the destination:

    • Use a Distributed Logical Router (DLR) or Edge Services Gateway (ESG) to connect the extended network.

    • If a single Edge Services Gateway is used for more than 8 networks, use a trunk interface.

  • Requirements in deployments using the NSX-T Data Center at the destination:

    • HCX connects to Tier-1 Gateways and Segments created in the Networking tab (simplified UI). NSX configurations created in the Advanced Networking & Security tab cannot be used with HCX Network Extension and Migration operations.

    • Additional network extension appliances may be required when extending more than 8 networks.
  • Requirements when extending Virtual Distributed Switch networks:
    • vSphere Distributed Switch Version 5.1.0 or higher is required.
  • Requirements for extending NSX-T networks in source environments:
    Note: Registering NSX-T in an HCX Connector is optional, except when extending NSX networks or migrating NSX Security Tags. If NSX-T is registered, the following requirements apply:
    • The NSX-T Manager must be registered during the HCX Manager deployment.
    • The NSX-T Manager must be Version 2.4 or higher.
    • NSX-T Overlay or VLAN Transport Zones must be configured in the vCenter Server where the network originates.
      • The ESX hosts where the NSX-T segment originates must be configured as NSX-T transport nodes.
      • NSX-T Overlay and NSX-T VLAN networks can be extended.
    • NSX-T Overlay or VLAN Transport Zones must be configured in the destination vCenter Server or SDDC.
      • HCX will always create or connect to an existing NSX-T Overlay network during the network extension operation.
  • Requirements when extending NSX for vSphere Logical Switches:
    • The NSX-V Manager must be registered during the HCX Manager deployment.
    • The NSX-V Manager must be Version 6.4.8 or higher.
  • Requirements when extending vSphere Standard Switch networks:
    • Not supported.
  • General requirements:
    • Never extend the networks used to create the network profiles.
    • Never use HCX to extend the vSphere Management network or other VMkernel networks (for example: vMotion, vSAN, replication) to the remote site.