When you stretch a cluster, a route to the witness host is added to each ESXi host in the stretched cluster. You must delete these routes to use witness traffic separation.

Procedure

  1. In a web browser, log in to the first ESXi host in the stretched cluster using the VMware Host Client.
  2. In the navigation pane, click Manage and click the Services tab.
  3. Select the TSM-SSH service and click Start if not started.
  4. Open an SSH connection to the first ESXi host in the stretched cluster.
  5. Log in as root.
  6. Run the following command:
    esxcli network ip route ipv4 list
    The output returns something like: 
    Network      Netmask        Gateway       Interface  Source
-----------  -------------  ------------  ---------  ------
default      0.0.0.0        172.18.15.1   vmk2       MANUAL
169.254.0.0  255.255.255.0  0.0.0.0       vmk1       MANUAL
172.18.7.0   255.255.255.0  0.0.0.0       vmk3       MANUAL
172.18.13.0  255.255.255.0  0.0.0.0       vmk5       MANUAL
172.18.14.0  255.255.255.0  172.18.7.253  vmk3       MANUAL
172.18.15.0  255.255.255.0  0.0.0.0       vmk2       MANUAL
172.18.21.0  255.255.255.0  172.18.7.253  vmk3       MANUAL
  7. Delete the route to the witness host. For example:
    esxcfg-route -d 172.18.14.0/24 172.18.7.253
  8. In the VMware Host Client, select the TSM-SSH service for the ESXi host and click Stop.
  9. Repeat these steps for each ESXi host in the stretched cluster.