I`ve never paid much attention to these terms. It was enough for me to see on my brocade SAN switches WWNs that correspond WWNs in iLO/OA/AMM/IMM (or another IPMI) of the servers to make zones.
Well now I`m trying to figure out why ESXi console shows 2 WWNs instead of single one for each HBA port. Okay, many sources say that there are 2 entitys: WWPN and WWNN. WWPN is a 64-bit physical address of FC port (interface) and WWNN is a 64-bit physical address of HBA itself. Okay then, it should be 1 WWNN and 2 WWPNs. But there are 2 WWNNs and 2 WWPNs.
My IPMI thinks that server got single HBA with 2 ports:
My brocade SAN switches see only WWPNs (the image is from 2 switches):
But ESXi says that there are 2 different WWNNs (50:01:43:80:21:de:29:6d and 50:01:43:80:21:de:29:6f):
How so? And why so many sources say that host (its HBA) has single WWNN?
Is it possible that this mezzanine card have 2 processors and so have 2 WWNNs?