Cisco Cisco UCS C22 M3 Rack Server Guia De Resolução De Problemas

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Driver Dependence on Firmware
Device drivers have a strong dependence on the device firmware. Device drivers must be
compatible with the firmware level of a hardware device, so that they properly communicate with
each other; driver and firmware functionality must match for correct operation to take place. 
When Drivers Must be Installed and Updated
Device drivers come pre-installed with operating systems (such as Cisco OEM VMware ESXi
images), or they can be manually installed post-OS setup. 
Device drivers generally need to be updated after these procedures: 
UCS firmware upgrades
Major OS upgrades/patches 
Driver Versions Required
The UCS Hardware and Software Interoperability Matrix outlines the driver versions that are
required for a particular OS, device, and firmware combination. Follow these links for the Matrix
Utility Tool and the Matrix PDFs:
Warning: The driver versions listed on the matrix have been tested and verified by the Cisco
Engineering Quality Assurance team, and it is crucial to install the correct driver; otherwise,
you might run into unexpected behavior which could lead to network outages. 
This example shows that an ENIC driver version of 2.1.2.38 is required for a B200 M3 with a
Virtual Interface Card (VIC) 1240 that runs ESXi 5.1 U1, on UCS Release 2.1.1.