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Install fNIC Drivers

This guide assumes that the UCS 2 .1 .2a or later fNIC drivers have been installed and are running . Please see the Cisco

UCS Manager Install and Upgrade Guides, Virtual Interface Card Drivers section, for complete driver installation instructions:

http://www .cisco .com/c/en/us/support/servers-unified-computing/ucs-manager/products-installation-guides-list .html

In addition, please review the Cisco UCS Hardware Compatibility List (HCL) to confirm hardware, operating system, and driver

compatibility:

http://www .cisco .com/en/US/products/ps10477/prod_technical_reference_list .html

Configuring fNIC Tunables

LUN Queue Depth

Description: The total number of I/O requests that can be outstanding on a per-LUN basis .

Parameter name: fnic_max_qdepth

Default value: 32

Configuration capabilities:

• Boot Time

» Requires reboot for changes to take effect .

» Changes are persistent across reboots .

• Load Time

» Disruptive to SAN attached storage .

» Requires stopping SAN I/O, removing fNIC module dependencies, and removing and reloading the fNIC module .

» Not possible with the Boot from SAN configuration .

» Changes are nonpersistent across reboots .

• Run Time

» Nondisruptive .

» Changes apply only to newly discovered LUNs after modification .

» Changes are nonpersistent across reboots .