When discovering devices in USM, using the discovery_agent, the devices don't show any interfaces. When choosing a device from the Inventory and then clicking on the Interface tab it throws the message: "No interfaces to show for 'device_name' ".
Why is this happening and what can be done to fix it?
There could be various reasons but the one I found that it worked for me is changing the SNMP Version from 2 to 1 in the Discovery Wizard:
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Version 2 executes the query at bloke level (for a group of devices at the same time) whereas Version 1 does it a device level (device by device).
Other possible solutions:
* Deactivate the discovery_server probe
* Remove the Inventory in USM (Actions > Select All > Actions > Delete Selected)
* Activate the discovery_server probe
* Start the discovery
If the Interfaces still don't appear, recreate the scopes in Discovery Wizard.