These settings can vary for different Ethernet hardware and drivers. In most cases, you must modify the driver.conf file of the Ethernet interface and then reboot. See the driver.conf file for your Ethernet interface for details on how to enable these features.
Perform one of the following prerequisite steps before you create an FCoE port on an Ethernet interface:
Enable 802.3x (also called PAUSE) on the Ethernet interface.
Doing so ensures a consistent Ethernet transport.
Enable jumbo frames (> 2.5 Kbyte) on the Ethernet interface.
A Fibre Channel data frame can be as large as 2136 bytes.