I have discovered ESXi 5.1 Hosts and network switches in SMARTS INCHARGE AM-PM and ESM (v9.1). Have enabled LLDP to make sure dependency mapping is shown correctly.

The issue is -- when I test a port failure (shutdown port on switch connected for a Host) on network switch, I don't see an event "Port Disabled" in Global console. Later I realized that this happens for any Host that does not have the class CABLE discovered (INCHARGE AM-PM >  ConnectedVia > Cable). And that the event would come from this class "Cable".

There are few other Hosts having this class discovered, and I see alerts reported for Port Disable. What could be causing CABLE class not discovered for certain systems? Tried rediscovering the Host and switch but did not help. Thanks.