Configure the VMkernel Adapters on the vSAN Witness Host

To enable vSAN data network communication between the availability zones, configure the witness network on the vSAN witness host.
  1. In the inventory panel of the vCenter Server Client, select
    vCenter Server
    Datacenter
    .
  2. Select the vSAN witness host and click the
    Configure
    tab.
  3. Remove the dedicated witness traffic VMkernel adapter on the vSAN Witness host.
    1. In the
      Networking
      section, click
      VMkernel adapters
      .
    2. Select the kernel adapter
      vmk1
      with
      secondaryPg
      as
      Network label
      and click
      Remove
      .
    3. On the
      Remove VMkernel adapter
      dialog box, click
      Remove
  4. Remove the virtual machine network port group on the vSAN witness host.
    1. In the left pane, select
      Networking
      Virtual switches
      .
    2. Expand the
      Standard switch: secondary switch
      section.
    3. Click the vertical ellipsis and from the drop-down menu, select
      Remove
      .
    4. On the
      Remove standard switch
      dialog box, click
      Yes
      .
    5. Expand the
      Standard switch: vSwitch0
      section.
    6. In the
      VM Network
      pane, click the vertical ellipsis and from the drop-down menu, select
      Remove
      .
    7. On the
      Remove port group
      dialog box, click
      Yes
      .
  5. Enable witness traffic on the VMkernel adapter for the management network of the vSAN witness host.
    1. On the
      VMkernel adapters
      page, select the
      vmk0
      adapter and click
      Edit
      .
    2. In the
      vmk0 - edit settings
      dialog box, click
      Port properties
      , select the
      vSAN
      check box, and click
      OK
      .