8–Configuring FCoE in a Linux Environment
N_Port ID Virtualization
8-26 FE0254601-00 A
4. To benefit from I/O segregation and NPIV monitoring after creating a virtual
port, configure zoning on the FCoE switch, and configure selective LUN
presentation on the Fibre Channel or FCoE target array. For information
about configuring the FCoE switch and target array, refer to the switch and
target array documentation.
Verifying the Creation of Virtual Ports
Use sysfs to verify that a virtual adapter port has been created by searching
sys/class/scsi_host/hostX for a new entry. Issue the following command,
where X is the virtual port SCSI host ID for the virtual port:
#ls –l /sys/class/scsi_host/hostX/
The new virtual port is the first available numeral in the list of hostX entries in
/sys/class/scsi_host/. To discern between adapter virtual and physical
ports in sysfs, refer to “Differentiating Virtual Ports from Physical Ports in sysfs” on
page 8-28.
Alternatively, you can display all virtual ports created on a physical adapter port.
For example:
# ls –l /sys/class/scsi_host/host4/device/
Figure 8-10 shows that host6, host7 and host8 are the three virtual ports that exist
for the physical port host4.
CAUTION!
If you reload the FCoE driver (qla2xxx), or reboot the server, all virtual ports
are discarded.
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