Ethernet Devices
5-28
Express5800/
ftServer
: System Administrator’s Guide for the Linux Operating System
eth080010 bond0 DUPLEX UP - -
eth080011 bond1 DUPLEX UP - -
In
Example 5-6
, there are two online channel-bonding interfaces (masters), bond0 and
bond1, each composed of two physical interfaces (slaves). The output shows the four
physical slave interfaces in the system and also shows their status and the name of the
bond to which they belong. Note that three other channel-bonding interfaces are
defined by default, but they are not configured and are therefore offline.
You can monitor additional information about the currently installed channel-bonding
and physical interfaces by running the Linux
ifconfig
tool.
Configuring Channel-Bonding Interfaces
You configure and administer channel-bonding interfaces using standard Linux
procedures. Configuration of channel-bonding interfaces is controlled by the
ifcfg-*
files in the
/etc/sysconfig/network-scripts
directory. You modify existing
channel bond configurations by editing the bond’s
ifcfg-bond
n
file or the bond’s
slaves’ interface
ifcfg-eth*
files. Additionally, you use standard Linux network
utilities like
ifdown
,
ifup
,
service
,
ifconfig
,
ip
, and
route
.
By default, the system supports five channel-bonding interfaces. In the unlikely event
that you must configure more than five bonding master interfaces (up to a maximum of
10), modify the options line in the
/etc/modprobe.d/ft-network.conf
file so that
max_bonds=
x
, where
x
is the desired number of channel-bonding interfaces. Perform
the following procedure to activate configuration-file modifications.
To activate configuration-file modifications
1. Type the
ifdown
command to stop all network interfaces.
2. Type the
rmmod
command to unload the bonding kernel module. This disables
network access.
3. Type the
modprobe
command to reload the bonding module. This enables
network access with the newly designated number of channel-bonding interfaces.
4. If necessary, type an
ifup
bond
N
command for each bonded interface you wish
to restart.
All channel-bonding interfaces must operate in the same mode. If you want to change
the mode from the default setting (mode 1, active-backup mode), modify the options
line in the
/etc/modprob.d/ft-network.conf
file so that
mode=
x
, where
x
is the
desired mode of operation. To activate configuration-file modifications, perform the
preceding procedure.
