On each host that you want to add to a vSphere HA cluster, you must configure two different networking switches so that the host can also support vSphere Fault Tolerance.
To enable Fault Tolerance for a host, you must complete this procedure twice, once for each port group option to ensure that sufficient bandwidth is available for Fault Tolerance logging. Select one option, finish this procedure, and repeat the procedure a second time, selecting the other port group option.
- Log in to the vSphere Client and select a host in the inventory pane.
- Click the Configuration tab.
- Select Networking under Hardware, and click the Add Networking link.
The Add Network wizard appears.
- Select VMkernel under Connection Types and click Next.
- Select Create a virtual switch and click Next.
- Provide a label for the switch.
- Select either Use this port group for vMotion or Use this port group for Fault Tolerance logging and click Next.
- Provide an IP address and subnet mask and click Next.
- Click Finish.
What to do next
To confirm that you successfully enabled both vMotion and Fault Tolerance on the host, view its Summary tab in the vSphere Client. In the General pane, the fields vMotion Enabled and Host Configured for FT should show yes.