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6–Configuring NIC Functionality in the Converged Network Adapter
Configuring the NIC in a Linux Environment
FE0254601-00 A 6-31
Modifying NIC Driver Parameters (Linux)
The driver parameters described in Table 6-2 can 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.
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.
mtu Jumbo Packet
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).
1500 9000 Sysfs, ifconfig
NOTE:
Not all parameters can be modified using the same utility or function. Refer
to Table 6-2 for information about available configuration methods for each
parameter.
Table 6-2. NIC Driver Parameters for Linux (Continued)
Parameter Name Description
Default
Value
Allowed
Values
Configuration
Method