Skip to main content
IBM Redbooks

Advanced Networking Concepts Applied Using Linux on System z: Changes to Implementing the Bonding Module

Web Doc

Note: This is publication is now archived. For reference only.

thumbnail 

Published on 29 March 2013

  1. View in HTML
Share this page:
 
 

IBM Form #: TIPS1000

Authors: Lydia Parziale

    menu icon

    Abstract

    There are changes to using channel bonding interfaces introduced with SLES 11 SP 2. Eric Marins, an IBM® IT Specialist for Linux on IBM System z®, offers insight into these changes with the following updates to section 4.2 of the IBM Redbooks® publication Advanced Networking Concepts Applied Using Linux on IBM System z, SG24-7995.

    Contents

    This example provides updates for the files and commands used by Linux on System z running SLES 11 SP2.

    1. To activate the bonding module when the network interface is loaded, create a new file called /etc/modprobe.d/bonding.conf with the following content:


    #/etc/modprobe.d/bonding.conf file
    alias netdev-bond0 bonding
    options lacp_rate=fast miimon=500 mode=4 xmit_hash_policy=layer2
    2. Ensure that you have the correct module name listed in /etc/modprobe.d/bonding.conf (shown in red.)

    #/etc/modprobe.d/bonding.conf file:
    alias     netdev-bond0 bonding
    options lacp_rate=fast miimon=500 mode=4 xmit_hash_policy=layer2

    3. Load the module by issuing the following command from a command prompt:

    modprobe bonding

    4. Add the following tags in the /etc/sysconfig/network/ifcfg-bond0 file:

    NAME='Bond0'
    DEVICE=bond0
    5. Remove the following tag in the /etc/sysconfig/network/ifcfg-eth1, /etc/sysconfig/network/ifcfg-eth2 and /etc/sysconfig/network/ifcfg-bond0 files:
    LLADDR=X:X:X:X:X:X #where X:X:X:X:X:X is a MAC address

    6. Recycle the network service to load the bonding device by issuing the following command from a command prompt:

    /etc/init.d/network restart

    7. Use the new command ip link show to report the relationship between the interfaces MASTER and SLAVE:

    ip link show

    The ip link show command produces the following output:

    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 02:a0:a1:00:00:1a brd ff:ff:ff:ff:ff:ff
    3: eth1: <BROADCAST,MULTICAST,    SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UNKNOWN qlen 1000
    link/ether 02:00:00:0e:d0:05 brd ff:ff:ff:ff:ff:ff
    4: eth2: <BROADCAST,MULTICAST,    SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UNKNOWN qlen 1000
    link/ether 02:00:00:0e:d0:05 brd ff:ff:ff:ff:ff:ff
    7: bond0: <BROADCAST,MULTICAST    ,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    link/ether 02:00:00:0e:d0:05 brd ff:ff:ff:ff:ff:ff

     

      Special Notices

      The material included in this document is in DRAFT form and is provided 'as is' without warranty of any kind. IBM is not responsible for the accuracy or completeness of the material, and may update the document at any time. The final, published document may not include any, or all, of the material included herein. Client assumes all risks associated with Client's use of this document.