Mike,
thanks again. My question was always related to why it is used a PN in the boot target for SAN booting.
It might not been clear, but in the configuration of the host.
Being (even more) picky, some IBM hosts do require NN and PN for the target, so it seems it's not "by design" but
a de facto standard,
I don't know now if a LUN that is provided at a WWPN should also be accesible at the corresponding WWNN. I guess not, and
all the thing revolves out of a security issue...
-Carlos