When the MIB object 'issHealthChkStatus' indicates health as down, this object provides the reason for errors encountered. nonRecovTaskInitializationFailure(1), Indicates the occurence of non-recoverable failure during Task initialization. nonRecovInsufficientStartupMemory(2), Indicates that there is insufficient memory for successful startup. This error is non-recoverable and requires sufficient memory to be available in the system for successful ISS startup. recovCruBuffExhausted(3), Indicates that CRU Buffer Exhausted. recovConfigRestoreFailed(4), Indicates that config-restore failed for ISS. This is a recoverable error. recovProtocolMemPoolExhausted(5), Indicates that a mem-pool associated with a specific module in ISS has drained out. This error may affect the functioning of the specific protocol alone and is treated as a recoverable error. By default issHealthChkErrorReason is 0.