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21-4
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 21 Configuring N Port Virtualization
About NPV
Note The BB_SCN of internal FLOGIs on NP ports is always set to zero. The BB_SCN is supported at the
F-port of the NPV device.
Figure 21-3 shows the internal FLOGI flows between an NPV core switch and an NPV device.
Figure 21-3 Internal FLOGI Flows
Table 21-1 identifies the internal FLOGI parameters that appear in Figure 21-3.
Although fWWN-based zoning is supported for NPV devices, it is not recommended because:
• Zoning is not enforced at the NPV device (rather, it is enforced on the NPV core switch).
• Multiple devices behind an NPV device log in via the same F port on the core (they use same fWWN
and cannot be separated into different zones).
• The same device might log in using different fWWNs on the core switch (depending on the NPV
link it uses) and may need to be zoned using different fWWNs.
NPV Core Switch
fc 5/10 fwwn
pwwn
nwwn
fc 1/5
NPV Device
184572
Table 21-1 Internal FLOGI Parameters
Parameter Derived From
pWWN The fWWN of the NP port.
nWWN The VSAN-based sWWN of the NPV device.
fWWN The fWWN of the F port on the NPV core switch.
symbolic port name The switch name and NP port interface string.
Note If there is no switch name available, then the output will display
“switch.” For example, switch: fc1/5.
IP address The IP address of the NPV device.
symbolic node name The NPV switch name.
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