MTU value
When Jumbo Frame is used in the virtual NIC and shared NIC, the following
MTU (maximum transfer unit) sizes are supported by LPAR manager.
•
Up to 9000 bytes
CB 520X
Install OS on the internal RAID in CB 520X where a single virtual drive is
created. If creating multiple virtual drives, make sure to install the OS on
virtual drive 0.
Setting up after installation
This section describes the settings after Red Hat Enterprise Linux 6 is
installed.
Note: For LPAR manager environment, see
Setting up after installation on
to perform the setup procedure.
Setup procedure
Note: When having installed tboot package (tboot-x.xx-x.el6.x86_64.rpm/
tboot-x.xx-x.el6.i686.rpm) with LSI SAS 2008 RAID board (Internal SAS
RAID controller) or Internal SATA RAID controller for CB 520A A1 server
blade or CB 520X server blade or CB 520H B3 server blade change the setting
for /boot/grub/grub.conf referring to
Follow steps shown below to set up the OS after installation.
1
.
Disabling TCP Checksum Offload function
TCP Checksum Offload is a function that checks TCP packets in the LAN
controller. If TCP Checksum Offload is enabled, packet data may be
destroyed when the LAN controller fails.
Targeted drivers
¢
tg3 driver
¢
igb driver
Values: off or on (off: disabled; on: enabled)
Perform the ethtool command to disabling TCP Checksum Offload for both
receive and transmit.
Add as same number of ethtool command lines as the number of LAN
controllers to /sbin/ifup-pre-local file as shown below, and reboot the OS.
The new settings are automatically configured at the OS boot.
Example: To disabling two LAN controllers
Add the following line to /sbin//ifup-pre-local file on condition that the OS
recognizes them as network devices eht0 and eth1.
Red Hat Enterprise Linux 6
2-15
Hitachi Compute Blade Series OS Installation Guide for Red Hat Enterprise Linux