An "EM Running State" of "Unknown" may or may not indicate that there is a functionality problem.
For example in a APM cluster failover environment with the following configuration:
- A Collector registers its NIC IP Addresses with the APM DB and can be succesfully used for assigning CEM Services.
- A MOM is using a Collector Virtual IP Address (VIP) and can successfully connect to it.
An "Unknown" running state will be reported instead of "Up" because the VIP does not match any of the NIC IPs. However all functionality is working as expected.