DX NetOps Performance Management is not collecting metrics on the device because it is shown as inaccessible in the discovery profile history.
All supported DX NetOps Performance Management releases
Device and/or network issues.
Try the following tests from the Data Collector that will be used to discover and manage the device. If both fail it validates the problem is environmental. Are there firewalls or ACL's or other tools controlling communications that might be causing the problem?
See more in the SNMP Querying Tools section of the documentation.
Also you can looking in the Data Aggregator logs:
INFO | 6dcf-thread-3457 | AAAA-MM-DDTHH:MM:SS,NNN | DeviceDiscoveryTask | scovery.impl.DeviceDiscoveryTask 1723 | .im.aggregator.discovery | | x.x.x.127 (64691546)'s primary IP was the network ID or broadcast address. It will be deleted.
It seems the IP address of the device (x.x.x.127) matches the broadcast IP address of one of the networks discovered in the device. We consider that as non valid IP address
DeviceDiscoveryTask - This is triggered when a discovery is issued
ProfileDiscoveryTask - This is triggered when a profile rediscovery is needed because there have been 2 consecutive failed polls