Here are some Triage Steps that you can perform:
- Perform an RCA on your Cluster first. You want to gather an RCA Bundle before making any changes so that you have this for the Cisco TAC Support Team.
- Perform a "Update Telemetry Settings" with "Force" checked for the problem network devices.
- Perform a "sh telemetry connection all" on all devices and the Index Peer Address should
pointing to the Cisco DNA Center. The state should be "Active / Connection up"
- Perform a System Health / Validation Tool Check for Assurance Health. Review the results to see if there are any Critical or Warning indicators.
- There could be some issues with the "pipeline" services also
I would try these steps and if you still have issues, then I would suggest opening a Cisco TAC Support Ticket so that the Cisco DNA Engineer can further assess your issues.
