09-30-2014
LPAR NIC Problem
On all our lpars we have our main interface set up and a backup network interface. On a number of our lpars those connections go to a down state for no apparent reason. They are still attached but they show up as "*en1" in netstat. Has anyone else come across this issue or know why an interface will go down? I can't find a reason for this behavior.
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LEARN ABOUT SUSE
ifcfg-bonding
IFCFG-BONDING(5) Network configuration IFCFG-BONDING(5)
NAME
ifcfg-bonding - interface bonding configuration
SYNOPSIS
/etc/sysconfig/network/ifcfg-bond*
Bonding Interfaces
To setup a bonding interface you need a configuration file ifcfg-bond<X> with the usual network settings. But you must add additional vari-
ables
BONDING_MASTER
must be set to 'yes' to identify this interface as a bonding interface
BONDING_SLAVE_<X>
here you specify the interface name representing the slave network interfaces.
BONDING_MODULE_OPTS
contains bonding options. Here you can set interface timeouts or working modes ('mode=active-backup' for backup mode). For addi-
tional information take a look into the documentation mentioned at the bottom. Note, that this options are not passed as parameters
to the bonding kernel module any more, but set via sysfs interface. This variable will be renamed in the feature.
BONDING_SKIP_REMOVE_WORKAROUND
When set to "yes", a bonding interface will be not removed while ifdown any more to avoid problems, e.g. when some third party ker-
nel module, such as Veritas 'llt' module, does not react correctly to the UNREGISTER event and does not remove its references to the
bonding interface causing all network related operation to stuck.
Note: the bonding options are not reverted when this option is enabled and it is required to either explicitly keep the old options
and set them to their default setting on bonding configuration changes or to reboot.
Example
Example for a bonding interface on eth0 and eth1 using the backup mode
ifcfg-bond0
STARTMODE='onboot'
BOOTPROTO='static'
IPADDR='192.168.0.1/24'
BONDING_MASTER='yes'
BONDING_SLAVE_0='eth0'
BONDING_SLAVE_1='eth1'
BONDING_MODULE_OPTS='mode=active-backup miimon=100'
Additional Information
For additional and more general information take a look into /usr/src/linux/Documentation/networking/bonding.txt. Maybe you need to
install the kernel sources to get this additional documentation.
The configuration of routes for this kind of interface does not differ from ordinary interfaces. See man routes for details.
BUGS
Please report bugs at <http://www.suse.de/feedback>
AUTHOR
Christian Zoz <zoz@suse.de> -- ifup script
Wilken Gottwalt <wgottwalt@suse.de> -- ifcfg-bonding manual page
SEE ALSO
ifcfg(5), ifup(8).
sysconfig April 2005 IFCFG-BONDING(5)