IP multipathing with RHEL 5

In this page you can find sample working configs, which do following:

- setup two bond interfaces (bond0, bond1) with 802.3ad support
- setup two aliases for bond0
- setup two VLANs on bond1
- setup custom routes for these VLANs
- setup default gw trought bond0

All this we make on RedHat Linux 5.4, server is SunFire x4150 with 4x onboard ethernet devices.

IO multipathing with RHEL 5

In this post, we describe working IO multipathing configuration. Used technologies: RedHat Linux 5.4 64bit, 2x SunFire x4150, Sun StorageTek 2540, 2x Qlogic FC HBA.

Turn on word wrapping in "pre" tag

On Blogger, you need to edit template to turn on wrapping of tag "pre", otherwise long lines are not showing correctly. So paste this to your template:

pre {
white-space: -moz-pre-wrap; /* Mozilla, supported since 1999 */
white-space: -pre-wrap; /* Opera 4 - 6 */
white-space: -o-pre-wrap; /* Opera 7 */
white-space: pre-wrap; /* CSS3 */
word-wrap: break-word; /* IE 5.5+ */
 background: #dddddd;
 display: block;
 padding: 0.5em 1em;
 border: 1px solid #bebab0;
}

Redhat 5 + serial console setup

Here is quick setup of serial console for RedHat 5. It works for other linux distros too.

# grep agetty /etc/inittab
S0:12345:respawn:/sbin/agetty ttyS0 9600 vt100-nav

# grep SAFE /etc/sysconfig/kudzu
SAFE=yes

# grep ttyS0 /etc/securetty
ttyS0

# cat /boot/grub/menu.lst
default=0
timeout=5
hiddenmenu
serial --unit=0 --speed=9600 --word=8 --parity=no --stop=1
terminal --timeout=10 serial console
title Red Hat Enterprise Linux Server (2.6.18-164.2.1.el5)
 root (hd0,0)
 kernel /vmlinuz-2.6.18-164.2.1.el5 ro root=/dev/VolGroup00/rootvol console=tty0 console=ttyS0,9600n8 quiet
 initrd /initrd-2.6.18-164.2.1.el5.img