The Model entry is derived from the sysObjectID OID value. This is generally established during a certification via the certification team. If it is displaying as blank that means there is no reference to the sysObjectID in question. You can customize this by doing the following steps on ALL Data Collectors:
1. Navigate to /opt/IMDataCollector/apache*/etc
2. Create a file named ModelMap.cfg
3. Enter your sysObjectID = Model name, for example:
1.3.6.1.4.1.9.12.3.1.3.1147=Cisco Nexus 7004
4. Save and exit the editor
5. Grep the karaf.log to ensure the file was read successfully
grep ModelMap.cfg ../data/log/karaf.log
There should be an entry mentioning "Creating configuration from ModelMap.cfg"
6. You can also validate this by accessing the following URL from the DC CLI:
curl -vk http://127.0.0.1:8681/debug/dispatcher/container/com.ca.im.data-mgmt.common/bean/modelmapcfg
7. Once everything checks out, rediscover the devices with the sysObjectID that you updated and within a few moments, the model name should be populated