DNAC Assurance reports devices as unreachable

[Wes Schochet]

I am new to DNAC and looking for some advice. 

Assurance is reporting many P1 issues where my access switches (non-fabric) "is unreachable from Cisco DNA Center".  These devices are online and running - I can ping them from DNA center and no other monitoring system or logs show any problems.    Looking at individual devices in Assurance, there are DEVICE_AVAILABILITY:UNREACHABLE messages every minute or so. 

This is happening on many devices.  Do i just ignore these issues or is there a way to help DNAC see them more reliably?  Opinions on the best way to proceed please...

Thanks

[Tomas de Leon · Accepted solution]

The first thing that I would do is to pick one device that is experiencing this issue.

• Go to the Device Inventory and look at the current "Reachability" & "Manageability" Status.
• If "Device Unreachable", you can click on the error and it will show you things to look at. This is typically an SNMP issue or one of the Credential issues
• To verify IP connectivity with CLI credentials, click on the Device itself. In the Device page, Click on the "Run Commands".
• In the Command Runner Window, type "show version". If the command does not run and you get a connection error, then that is either an IP connectivity or CLI credential issue.
• Then next thing to do would to re-run the Discovery Task for the problem device and verify the status changes in inventory.

 

 

  

[Wes Schochet]

Thanks.  I ran a full discovery again.  At first, nothing seemed to change.  I came back about an hour later and 80 of my 85 unreachable devices have resolved.