Connected

Indicates Peer Agent is currently connected to the Peer Management Broker.

Disconnected

Indicates that Peer Agent has disconnected from the Peer Management Broker.  This can be a result of stopping the Peer Agent, or if the network connection between the Peer Agent and the Peer Management Broker was severed.

Pending Disconnect

This indicates that a heartbeat for the Peer Agent was not received within the configured threshold and that the Peer Agent is in the process on being disconnected if a heartbeat is not received soon.  This status can also occur if the Peer Agent does not respond to a pending ping.

Unknown

If no connection status is displayed, then either the Peer Agent was not running on that host when the Peer Management Center was started, or the first heartbeat message has not been received from that host.