Requirements for Network Extension

HCX supports extending networks from VMware vSphere Distributed Switches, NSX segments, and NSXv logical switches.

The following information and requirements apply when extending networks:

• 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.
• Networks with NSX-T Data Center at the source:
  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.
• Networks with NSX-T Data Center at the destination:
  • HCX connects to Tier-1 Gateways and Segments created in the Networking tab (policy UI). NSX configurations created in the manager tab cannot be used with HCX Network Extension and migration operations.
  • Additional network extension appliances are required when extending more than 8 networks.
  • NSX-T Overlay must be configured in the destination vCenter Server or SDDC.
  • NSX-T Overlay and NSX-T VLAN networks are always created as NSX Overlay networks at the destination. HCX Network Extension is always to NSX Overlay networks. Pre-created segments in the vSphere Distributed Switch, CVDS, or VLAN transport zone, cannot be used as a destination.
• Networks with NSX-T Data Center at the source and the destination:
  • HCX extensions must be connected to Tier-1 Gateways and NSX-T segments that are created with the NSX-T Policy UI/API.
  Note: In addition to these requirements for both sites, individual requirements for networks with NSX-T at the source and the individual requirements for networks with NSX-T at the destination also apply.
• HCX does not support networks with NSX for vSphere at the destination.
• NSX for vSphere Logical Switches at the source.
  • The NSX-V Manager must be registered during the HCX Manager deployment.
  • The NSX-V Manager must be Version 6.4.0 or higher.