We have recently discovered and added Cisco WLC devices to CA Performance Management. The physical interfaces discovered against the High Speed Interface Vendor Certification are working fine.
There are also an excessive number of unwanted Cisco Airespace Wireless Interface elements being discovered. This has resulted in thousands of unwanted interface components that users now have to sort though in the interfaces table in order to find the physical interfaces they want information for.
When viewing the devices there are dual Metric Family entries found for the Interface Metric Family. Both show supported Vendor Certifications with actively polled elements.
One is the desired High Speed Interface Vendor Certification for the physical interfaces. The other is the unwanted Cisco Airespace Mobile Interface Vendor Certification.
The Interface Metric Family is only tied to the device through a single Monitoring Profile and Collection association. It isn't applied twice anywhere in the configuration.
How can these elements be removed and how can we prevent creation of new ones?
All support CA Performance Management releases
Caused by Vendor Certification Priority (VCP) Priority Group configurations.
The Interface MF NormalizedPortInfo shows these VCP entries for the ifXTable (High Speed Interface VC) and CiscoAirespaceWirelessMib (Cisco Airespace Mobile Interface VC).
Because the IfXTableMib is supported, and has RedBackPortHS in the PriorityGroup, it ties it back to the other PriorityGroup linked to a VC that the device supports. That would be the CiscoAirespaceWirelessMib.
Discovery finds support for and creates elements against IfXTableMib VendorCertID.
It then looks to find VCs in its PriorityGroup that exist in PriorityGroup entries for other VendorCertID entries.
RedBackPortHS is in the PriorityGroup for both. The device does support the CiscoAirespaceWirelessMib VC.
The elements get discovered.
Note that upgrading from r3.5 GA they run, to r3.6, should preserve the change we made, where previousl releases did not do that. It will also start to included a "RecommendedPriorityGroup" XML entry for each VendorCertID entry to show the recommended or default values. It would look something like: