A. use summary view in the device manager
B. from the DCNM-SAN client， view ISLs in real time from the Performance drop-down list
C. for each port channel， select Monitor Continually
D. configure traps for each port channel to utilize RMON
E. set up flows with the DCNM-SAN client and use the Performance Manager web client for performance collections

A. NPV is not enabled on the core switch？
B. The interface connected to the Core switch is in admin down state
C. The local host interface belongs to the wrong VSAN？
D. The local host interface is not able to login