Due to various reasons a VSA cluster member might stop responding even though the ESXi host is still working as expected.

A VSA cluster member stops responding or powers off, and its status changes to Offline in the VSA Manager tab.

The following reasons might contribute to the Offline status of a VSA cluster members.

Failure in the front-end network of the VSA virtual machine.

Power failure in the ESXi host that accommodates the VSA virtual machine.

If a VSA cluster member is not responding, right-click it and select Power > Reset.

The VSA cluster member reboots. Wait for its status to change to Online in the VSA Manager tab.

If the VSA cluster member is powered-off, right-click it and select Power > Start.

The VSA cluster member starts. Wait for its status to change to Online in the VSA Manager tab.

If none of the steps above fix the issue, replace the VSA cluster member by using the Replace VSA Cluster Member wizard.