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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 .
3 © 2014 Cisco and/or its affiliates . All rights reserved .
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