When you configure a cluster with communication links over UDP and add a failover system, you may see the following error message:

The same network adapter is specified for one or more links on the system. You must select a different network adapter for each communication link.

This issue occurs when you unplumb an IP address from one of the configured communication links. In this scenario, VCS may also go into jeopardy.

Workaround:

Plumb the IP address again.