I don’t think this is a bug in CMK it looks more like an SNMP problem on your Isilon system.
Other option is that your Isilon has the data in other OID’s (different firmware can result in different OID’s).
I don’t think this is a bug in CMK it looks more like an SNMP problem on your Isilon system.
Other option is that your Isilon has the data in other OID’s (different firmware can result in different OID’s).