The parameters are as follows:
+ad_select
+
+ Specifies the 802.3ad aggregation selection logic to use. The
+ possible values and their effects are:
+
+ stable or 0
+
+ The active aggregator is chosen by largest aggregate
+ bandwidth.
+
+ Reselection of the active aggregator occurs only when all
+ slaves of the active aggregator are down or the active
+ aggregator has no slaves.
+
+ This is the default value.
+
+ bandwidth or 1
+
+ The active aggregator is chosen by largest aggregate
+ bandwidth. Reselection occurs if:
+
+ - A slave is added to or removed from the bond
+
+ - Any slave's link state changes
+
+ - Any slave's 802.3ad association state changes
+
+ - The bond's administrative state changes to up
+
+ count or 2
+
+ The active aggregator is chosen by the largest number of
+ ports (slaves). Reselection occurs as described under the
+ "bandwidth" setting, above.
+
+ The bandwidth and count selection policies permit failover of
+ 802.3ad aggregations when partial failure of the active aggregator
+ occurs. This keeps the aggregator with the highest availability
+ (either in bandwidth or in number of ports) active at all times.
+
+ This option was added in bonding version 3.4.0.
+
arp_interval
Specifies the ARP link monitoring frequency in milliseconds.
When this policy is used in conjuction with the mii
monitor, devices which assert link up prior to being
able to actually transmit and receive are particularly
- susecptible to loss of the gratuitous ARP, and an
+ susceptible to loss of the gratuitous ARP, and an
appropriate updelay setting may be required.
follow or 2
Specifies the number of bonding devices to create for this
instance of the bonding driver. E.g., if max_bonds is 3, and
the bonding driver is not already loaded, then bond0, bond1
- and bond2 will be created. The default value is 1.
+ and bond2 will be created. The default value is 1. Specifying
+ a value of 0 will load bonding, but will not create any devices.
miimon
affects only the active-backup mode. This option was added for
bonding version 3.3.0.
+num_unsol_na
+
+ Specifies the number of unsolicited IPv6 Neighbor Advertisements
+ to be issued after a failover event. One unsolicited NA is issued
+ immediately after the failover.
+
+ The valid range is 0 - 255; the default value is 1. This option
+ affects only the active-backup mode. This option was added for
+ bonding version 3.4.0.
+
primary
A string (eth0, eth2, etc) specifying which slave is the
in environments where a layer3 gateway device is
required to reach most destinations.
- This algorithm is 802.3ad complient.
+ This algorithm is 802.3ad compliant.
layer3+4
NETMASK, NETWORK and BROADCAST) to match your network configuration.
For later versions of initscripts, such as that found with Fedora
-7 and Red Hat Enterprise Linux version 5 (or later), it is possible, and,
-indeed, preferable, to specify the bonding options in the ifcfg-bond0
+7 (or later) and Red Hat Enterprise Linux version 5 (or later), it is possible,
+and, indeed, preferable, to specify the bonding options in the ifcfg-bond0
file, e.g. a line of the format:
-BONDING_OPTS="mode=active-backup arp_interval=60 arp_ip_target=+192.168.1.254"
+BONDING_OPTS="mode=active-backup arp_interval=60 arp_ip_target=192.168.1.254"
will configure the bond with the specified options. The options
specified in BONDING_OPTS are identical to the bonding module parameters
-except for the arp_ip_target field. Each target should be included as a
-separate option and should be preceded by a '+' to indicate it should be
-added to the list of queried targets, e.g.,
+except for the arp_ip_target field when using versions of initscripts older
+than and 8.57 (Fedora 8) and 8.45.19 (Red Hat Enterprise Linux 5.2). When
+using older versions each target should be included as a separate option and
+should be preceded by a '+' to indicate it should be added to the list of
+queried targets, e.g.,
arp_ip_target=+192.168.1.1 arp_ip_target=+192.168.1.2
options via BONDING_OPTS, it is not necessary to edit /etc/modules.conf or
/etc/modprobe.conf.
- For older versions of initscripts that do not support
+ For even older versions of initscripts that do not support
BONDING_OPTS, it is necessary to edit /etc/modules.conf (or
/etc/modprobe.conf, depending upon your distro) to load the bonding module
with your desired options when the bond0 interface is brought up. The
To add ARP targets:
# echo +192.168.0.100 > /sys/class/net/bond0/bonding/arp_ip_target
# echo +192.168.0.101 > /sys/class/net/bond0/bonding/arp_ip_target
- NOTE: up to 10 target addresses may be specified.
+ NOTE: up to 16 target addresses may be specified.
To remove an ARP target:
# echo -192.168.0.100 > /sys/class/net/bond0/bonding/arp_ip_target
generally referred to as "trunk failover." This is a feature of the
switch that causes the link state of a particular switch port to be set
down (or up) when the state of another switch port goes down (or up).
-It's purpose is to propogate link failures from logically "exterior" ports
+Its purpose is to propagate link failures from logically "exterior" ports
to the logically "interior" ports that bonding is able to monitor via
miimon. Availability and configuration for trunk failover varies by
switch, but this can be a viable alternative to the ARP monitor when using
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff