Cisco Networks App for Splunk Enterprise: Why am I not getting Cisco devices inventory details (Eg: software version, model etc)?

Hi, I have configured the Cisco Networks App for Splunk Enterprise for monitoring Cisco syslog trigger. As I expected, the app is building a charts with respect to syslog data. However, I am not getting Cisco devices inventory details (like Eg: software version, model info etc..) on Cisco networks app. I need your assistance/help to tune the configuration if required. Thanks.