bonding in suse linux

Bonding in SUSE Enterprise Linux

Release:

SUSE Enterprise Linux 10

Problem:

Configure the bond0 interface with the interface eth0 and eth1

Solution:

1)     Create a bond0 interface file in the /etc/sysconfig/network directory.

            # vi /etc/sysconfig/network/ifcfg-bond0

           

            BONDING_MASTER='yes'

            BONDING_MODULE_OPTS='mode=1 miimon=100 use_carrier=0'

            BOOTPROTO='static'

            IPADDR='192.168.10.19'

            NETMASK='255.255.255.0'

            STARTMODE='onboot'

            USERCONTROL='no'

            BONDING_SLAVE0='bus-pci-0000:03:00.0'

            BONDING_SLAVE1='bus-pci-0000:03:00.1'

Note: “BONDING_SLAVE” value is available in the ethernet configuration file as a parameter “_nm_name” and also “mode=1” indicates active-backup policy  ( mode=0 indicates Round-robin policy).

2)     configure both the ethernet interface eth0 and eth1 like below

            # vi /etc/sysconfig/network/ifcfg-eth-id-xx:xx:xx:xx:xx:xx

            BOOTPROTO='none'

            STARTMODE='off'

            USERCONTROL='no'

                                        

3)     Restart the network service

            # service network restart

4)     To check the status of the bond0 interface use the below command

            # cat /proc/net/bonding/bond0

Manually Load Driver in initrd on SUSE

Manually Load Driver in initrd on SUSE Server

Release:

SUSE Linux Enterprise Server 10 SP2

Problem:

Need to manually add the hba card (fibre card) driver in initrd image

Solution:

1)      Load the required driver temporarily using the modprobe command

            # modprobe -v qla2xxx

2)      Check weather the driver module is loaded or not by using lsmod

           

                # lsmod | grep qla

3)      Add the new driver module entry in the kernel file

                # vi /etc/sysconfig/kernel

            INITRD_MODULES="ata_piix mptsas processor thermal fan jbd ext3 edd qla2xxx"

4)      Now recreate the initrd image using the below command.

                # mkinitrd -k /boot/vmlinux-2.6.16.60-0.21-smp.gz -i /boot/initrd-2.6.16.60-0.21-smp

5)      Reboot the server and check weather the driver is loaded or not.

           

                # init 6

       # lsmod | grep qla

Enable XDMCP in Linux

Enable XDMCP in Linux

Release:

RedHat Enterprise Linux 5

SUSE Linux 10

Problem:

Need to enable the xdmcp protocol in the Linux server for getting remote using XBrowser.

Solution:

In RHEL Server:

1)      Install the gdm package

# yum install gdm

2)      Enable the xdmcp protocol by adding the below entries in the custom.conf file.

# vi /etc/gdm/custom.conf

[security]

AllowRemoteRoot=true

DisallowTCP=false

[xdmcp]

Enable=true

Note: Here “AllowRemoteRoot=true” used to allow root access.

3)      Restart the gdm service

# gdm-restart

4)      Check weather xdmcp port is opened or not, using netstat command

# netstat –an | grep 177

udp        0      0 0.0.0.0:177         0.0.0.0:*  

In SUSE Server:

5)      Install the required 2 packages

# yum install gdm xorg-x11

6)      Set the default display manager by editing the displaymanager file

# vi /etc/sysconfig/displaymanager

DISPLAYMANAGER="gdm"

DISPLAYMANAGER_REMOTE_ACCESS="yes"

7)      Enable the xdmcp protocol by editing the gdm.conf file

# vi /etc/opt/gnome/gdm/gdm.conf

[security]

AllowRoot=true

AllowRemoteRoot=true

[xdmcp]

Enable=true

8)      To make xdmcp listening on xdm by edit the xdm-config file

# vi /etc/X11/xdm/xdm-config

!DisplayManager.requestPort:    0

Note: Comment out this line for xdmcp listen on xdm

9)      Restart the service and check with netstat

# rcxdm restart

# netstat –an | grep 177

udp        0      0 0.0.0.0:177             0.0.0.0:*

10)   Verify from the Windows client using Xbrowser as root.