sys64738

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====== Interface bonding ======

===== Bonding two network interfaces in active/passive configuration  =====

Directory /etc/sysconfig/network-scripts

  ifcfg-bond0:
  DEVICE=bond0
  IPADDR=<Server IP>
  NETMASK=<Server Netmask>
  GATEWAY=<Server Gateway>
  ONBOOT=yes
  BOOTPROTO=none
  USERCTL=no
  BONDING_OPTS="mode=1 miimon=100"
  TYPE=Ethernet
  
  ifcfg-eth0:
  DEVICE=eth0                                                                                                                                    
  BOOTPROTO=none                                                                                                                                  
  ONBOOT=yes                                                                                                                                        
  MASTER=bond0                                                                                                                                      
  SLAVE=yes
  USERCTL=no

  ifcfg-eth1:
  DEVICE=eth1
  ONBOOT=yes
  BOOTPROTO=none
  MASTER=bond0
  SLAVE=yes
  BOOTPROTO=none
  TYPE=Ethernet

Directory /etc/modprobe.d\\
File bonding.conf should look like this:
  alias bond0 bonding

**Please note::** placing bonding options in modprobe file is deprecated.

===== Bonding module can not be loaded =====

If IPV6 has been disabled this error can occur:

modprobe: FATAL: Error inserting bonding  (/lib/modules/2.6.18-194.17.1.el5/kernel/drivers/net/bonding/bonding.ko):  Unknown symbol in module, or unknown parameter 

Resolution:\\

Within the modprobe configuration file where IPV6 has been turned off /etc/modprobe.d/<your blacklist file.conf>

Change the line:
  install ipv6 /bin/true
  to
  options ipv6 disable=1


Bonding module can now be loaded without problems.


Reference:

[[https://access.redhat.com/kb/docs/DOC-50188]]
sys64738

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