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9–Linux Configuration for Bonding Mode and Virtual LAN (VLAN)
Linux Bonding Mode
NE0154601-00  C
9-5
arp_interval
This parameter specifies the ARP link monitoring frequency in milliseconds. When 
ARP monitoring is used in an etherchannel compatible mode (modes 0 and 2), the 
switch must be configured in a mode that evenly distributes packets across all 
links. 
When the switch is configured to distribute the packets in an XOR fashion, all 
replies from the ARP targets are received on the same link, which could cause the 
other team members to fail. ARP monitoring should not be used with miimon. A 
value of 0 disables ARP monitoring. The default value is 0.
arp_ip_target
This parameter specifies the IP addresses to use as ARP monitoring peers when 
arp_interval is greater than 0. These are the targets of the ARP request sent 
to determine the health of the link to the targets.
Specify these values in ddd.ddd.ddd.ddd format. Multiple IP addresses must 
be separated by a comma. At least one IP address must be given for ARP 
monitoring to function. The maximum number of targets that can be specified 
is 16. The default value is no IP addresses.
downdelay
This parameter specifies the time, in milliseconds, to wait before disabling a slave 
after a link failure has been detected. This option is valid only for the miimon link 
monitor. The downdelay value must be a multiple of the miimon value; 
otherwise, the value will be rounded down to the nearest multiple. The default 
value is 0.
lacp_rate
This parameter specifies the rate at which the link partner transmits LACPDU 
packets in 802.3ad mode. Possible values are:
Slow or 0: Request partner to transmit LACPDUs every 30 seconds 
(default).
Fast or 1: Request partner to transmit LACPDUs every 1 second.
QLogic Adapter Bonding Modes Under Linux
There are several modes that can be used for bonding the QLogic adapter under 
Linux. Note that there are variations in support and usage with respect to the 
hardware and Linux distributions, and that not all the modes work for a given 
system and network topology.