Situation: The client configured HA on two PA-850 units. They would like to know how to test it?
Resolution 1: Go to Device>High Availability> Operation Commands. Click on Suspend local device. Here are the example.
![](http://www.howtonetworking.com/blog/wp-content/uploads/2021/07/image-32.png)
It takes 1 to 2 seconds to switch.
![](http://www.howtonetworking.com/blog/wp-content/uploads/2021/07/image-33.png)
![](http://www.howtonetworking.com/blog/wp-content/uploads/2021/07/image-34.png)
Resolution 2: If you want to disconnect a cable for the test, you can add a interface in Link Group. Go to Device>High Availability>Link and Path Monitoring. Add the Interface, for example trusted interface. You can unplug the trusted interface to test it.
![](http://www.howtonetworking.com/blog/wp-content/uploads/2021/05/image-12-1024x528.png)
If the cable is disconnected, it take about 15 seconds to switch to standby unit.
![](http://www.howtonetworking.com/blog/wp-content/uploads/2021/07/image-35.png)
![](http://www.howtonetworking.com/blog/wp-content/uploads/2021/07/image-36.png)