Removing a network extension prevents further cross-site communications between virtual machines residing on that network. This operation is typical when the source side network is vacated.


  1. In the HCX Manager UI, select Services > Network Extension.
    The system displays a list of extended networks.
  2. Select the network or networks that must be unextended, and click the ellipsis menu to see a list of actions.
  3. Select the action: Unextend Network or Force Unextend Network.

    The interface opens and displays the selected network.

    Note: To remove multiple network extensions simultaneously, select the networks and click the Unextend Networks tab.
  4. (Optional) Expand the network entry and select Connect cloud network to cloud edge gateway after unextending to connect the remote side gateway.
    Dynamic routing can be enabled on the Cloud Edge Gateway as part of the OSPF or the BGP configuration. By default, the cloud segment is left disconnected from the Edge Gateway after removing the network extension. This is done to prevent an Edge Gateway from advertising a route to the cloud segment and causing a potential routing conflict with the network in the on-premises datacenter. Checking this option will connect the segment to the Cloud Edge Gateway after removing the network extension. If dynamic routing is enabled, the network will be advertised from the Cloud Edge Gateway. Refer to VMware Cloud on AWS Networking and Security guide to ensure proper routing configuration.
    Note: Unextending a network removes the HCX L2 bridged path without removing the NSX Segment or vSphere Port Group, or NSX interface. The NSX router interface remains disconnected when the option Connect cloud network is not used.
  5. To confirm the operation, click Unextend.