Hi,
Not for sure which DCNM version you're running on. Is these two issued swtich has generated other information on the dashboard and successful discovered. (for example, cpu usage, memory usage,etc)
Are all 6 switches new added to DCNM or these two switches has failed to collect traffic after working for sometime.
You could check some possible reason following below steps.
Check Monitor > Switch > Traffic whether all 6 switches are listed. If those two issue devices are missing, please check whether "access " option in the performace LAN collection page has been enabled. If not, you could enable it at the top and apply the config to see if the missing switches could start showing up on the traffic page with stats.
Hope this helps.
Need more information for further troubleshooting so suggested to raise a case to TAC Team for detailed troubleshooting. If you find my reply solved your question or issue, kindly click the 'Accept as Solution' button and vote it as helpful.
You can also learn more about Cisco NDFC (previously known as DCNM) through our live Ask the Experts (ATXs) session. Check out this ATXs Resources [https://community.cisco.com/t5/data-center-and-cloud-knowledge/cisco-aci-ask-the-experts-resources/ta-p/4394491] to view the latest schedule for upcoming sessions, as well as the useful references, e.g. online guides, FAQs.
