PowerFlex Manager: Switch performance metrics are not visible because NXAPI feature is not enabled

PowerFlex Manager > Resources > Cisco 9 K switch > View details:
 
The performance tab shows no metrics.

Cause: On Cisco Nexus switches, command-line interfaces (CLIs) are run only on the switch. NX-API CLI improves the accessibility of these CLIs by making them available outside of the switch by using HTTP or HTTPS. 

NX-API uses HTTP or HTTPS as its transport. CLIs are encoded into the HTTP or HTTPS POST body.
Starting with Cisco NX-OS Release 9.2(1), the NX-API feature is enabled by default on HTTPS port 443. HTTP port 80 is disabled.

​​​​​​Solution: 
1) Log into switch > enable nxapi feature:
conf t
feature nxapi
Note:
PFxM 3.6 & higher uses https (NOT http) for status check and metrics fetching, therefore for security reasons, nxapi can be disabled on http
! Enable and configure NXAPI
config t
feature nxapi
! Disable http, only https supported for security
no nxapi http
! Use the management interface only to communicate for NXAPI
nxapi use-vrf management

PFxM 3.5 & earlier uses https & http for status check and metrics fetching, therefore keep nxapi enabled for http. 
Note: if we enable the nxapi with feature nxapi command it only listens on HTTPS not HTTP, so we need NXAPI to listen on HTTP
! Enable and configure NXAPI
config t
feature nxapi
nxapi http port 80

2) After making changes on the switch, go to Resources > add check box next to switch > Run Inventory
3) View details now shows switch performance metrics

Cisco Switch (3K / 9K):

• Both HTTP and HTTPS needs to be enabled on Cisco switch.
• PFxM uses HTTP to check NXAPI status and then collect metrics via HTTPS

Dell switch:

• Metrics for OS9 switches (REST API - HTTP port 8008) needs to be enabled for metrics collection
• Metrics for OS10 switches (RESTCONF API -HTTPS) needs to be enabled for metrics collection