Sometimes modeling a device in Spectrum may show missing performance tab, greyed out (disabled) Performance Tab, 0% utilization value, greyed out (disabled) host configuration tab, GnSNMPDev model type, and other disabled components.
This happens if you are modeling a device which is not yet Certified within Spectrum. In some cases the vendor has updated existing devices with new MIBs and new MIB attributes must be utilized (mapped) for Spectrum to poll for correct data.
Check here to see if the device is Certified. This will also show which version the device was certified in Initially.
Release: All Spectrum Versions
Documentation on using Device Self Certification can be found here:
The introductory page to Device Certification linked above, also shows a Helpful Video on using Self Certification. The video link can also be found here:
The steps to be followed are: