Q-Logic 8100 SERIES manual Modifying NIC Driver Parameters Linux, Using modprobe

6–Configuring NIC Functionality in the Converged Network Adapter Configuring the NIC in a Linux Environment

Table 6-2. NIC Driver Parameters for Linux (Continued)

Parameter Name	Description	Default	Allowed	Configuration
		Value	Values	Method
mtu	Jumbo Packet	1500	9000	Sysfs, ifconfig
	enables jumbo
	packet capability for
	TCP/IP packets. In
	situations where
	large packets make
	up the majority of
	traffic, and additional
	latency can be toler-
	ated, Jumbo packets
	can reduce CPU use
	and improve wire effi-
	ciency. FCoE traffic
	uses an Ethernet
	frame size of 2554
	bytes (baby jumbo).

Modifying NIC Driver Parameters (Linux)

The driver parameters described in Table 6-2can be modified using various methods. Some of these parameters require a server reboot or a reload of the QLogic NIC driver (qlge). This section describes how to modify the QLogic 8100 Series Adapter NIC function parameters.

NOTE:

Not all parameters can be modified using the same utility or function. Refer to Table 6-2for information about available configuration methods for each parameter.

Using modprobe

Available by default in RHEL 5, modprobe is a Linux utility that intelligently adds or removes a module from the Linux kernel. The QLogic drivers for the 8100 Series Adapter are compiled and used as a module. Any driver parameter that is modified using this method requires that the QLogic driver be reloaded (for nonpersistent changes) or rebooted (for persistent changes). Therefore, this method disrupts I/O operations on the host.

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