User's Guide Gigabit Ethernet Host Adapters ITIpci 5100G/GF

LSI Logic Corporation Page 40 of 56
# reboot -- -r
Verify the configuration changes.
Enter the following command and verify that the appropriate VLANs are
present:
# ifconfig -a
Jumbo Frames Support
ITI-5100G/GF adapters support Jumbo Frames--frames of up to 9,000 bytes
that are sent between servers that have ITI-5100G/GF adapters and switches
that support Jumbo Frames. Host CPU utilization is significantly reduced and
network throughput is enhanced by sending 9,000 byte frames rather than the
standard 1,500 byte Ethernet frames.
Overview
A single ITI-5100G/GF adapter on a server can support standard Ethernet
frames as well as Jumbo Frames. Jumbo Frames are only sent between
servers that have ITI-5100G/GF adapters. Standard Ethernet frames are used
between servers that have ITI-5100G/GF Adapters and all other Ethernet
devices.
Note: Not all network switches support passing Jumbo Frames. Check
with your switch manufacturer for confirmation of Jumbo Frame support.
Configuring Jumbo Frames Support
To configure Jumbo Frame support, perform the following procedure:
1. Create the
/etc/jumbo.alt <num> file.
2. Use your regular text editor to put the number “9000 " into the
/etc/jumbo.alt <num> file.
Put the number “9000 " in the file, without spaces or blank lines.
3. If you are finished with all optional configuration, reboot the system.
Changes to the optional configuration parameters (Jumbo Frame, or
Dual Homing) do not take effect until you reboot the system. If you will
be making changes to the other optional parameters during your
configuration session, you should wait to reboot until those changes are
complete.