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.

You can remove a network extension at any time, but be aware that removing an extended network can impact the network infrastructure. Migrated virtual machines that use a source environment DHCP server or that use statically assigned network services like DNC or NTP can lose those services after unextending a network.


  1. In the HCX+ Console, select 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 Unextend Network.

    The interface opens and displays the selected network.

  4. (Optional) Select Connect cloud network to cloud edge gateway after unextending to connect the remote side gateway.

    Selecting this check box connects the cloud network to the cloud edge gateway after removing the extension. If dynamic routing is activated, the cloud network is advertised from the cloud Edge Gateway and might cause a routing conflict.


    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 selected.

  5. To confirm the operation, click Unextend.
    Note: If the unextend operation fails, use Force Unextend to remove the extension and clear internal operations and processes from the source and the destination sites.