Hitachi Compute Blade 2500 series, Compute Blade 500 series Installation Manual page 36

If there is no /sbin/ifup-pre-local file, create a new file with the file
privilege 755 and add the setting above. When the file exists, add the
command lines above to the file. Then reboot the OS or the network
device with the new setting, which the new setting takes an effect.
When you are enabling TCP Checksum Offload, replace each value off
with on for tx/rx parameter in the above example.
Note: Do not use NetworkManager service. When NetworkManager
service is started, it has been shown that the following problem occurred.
DNS server information registered in /etc/resolv.conf may be deleted.
2 Setting NetworkManager service to off
.
Perform the following commands to set NetworkManager service to off.
a
.
b
.
c
.
3 Customizing /etc/sysctl.conf
.
Validate the magic SysRq key to collect information when a problem
occurs. Edit or add the following line.
Add a setting to induce kernel panic when NMI occurs, with which you can
quickly detect a failure in hardware and drivers. Edit or add the following
lines.
Add or edit the following line to set the console log level to 3. By changing
the level, you can avoid the console overload, which can result in
significant deterioration of applications or in Linux hang-up.
2-16
Hitachi Compute Blade Series OS Installation Guide for Red Hat Enterprise Linux
Perform the following command to stop NetworkManager service.
# service NetworkManager stop
Perform the following command to set NetworkManager service to off.
# chkconfig NetworkManager off
Perform the following command to check that NetworkManager
service is off.
# chkconfig | grep NetworkManager
The following message is shown.
NetworkManager 0:off 1:off 2:off 3:off 4:off 5:off 6:off
Red Hat Enterprise Linux 6