combines multiple Ethernet links into a single high-speed link. Configuring
link aggregation increases the capacity and availability of the communication
channel between the NetScaler appliance and other connected devices. An
aggregated link is also referred to as a "channel."
When a network
interface is bound to a channel, the channel parameters have precedence over
the network interface parameters. (That is, the network interface parameters
are ignored.) A network interface can be bound only to one channel.
When a network
interface is bound to a channel, it drops its VLAN configuration. The interface
is removed from the VLAN that it originally belonged to and added to the
default VLAN. However, you can bind the channel back to the old VLAN, or to a
new one. For example, if you bind network interfaces 1/2 and 1/3 to a VLAN with
ID 2 (VLAN 2), and then bind them to channel LA/1, the network interfaces are
moved to the default VLAN, but you can bind the channel to VLAN 2.
If you configure a
channel by using three interfaces that are assigned to one instance, and a
second instance uses some of these interfaces, the Management Service shuts
down the second instance, modifies the network settings, and restarts the
instance. For example, assume two instances, Instance1 and Instance2. When
these instances are provisioned, interfaces 10/1, 10/2, and 10/3 are assigned
to Instance1, and interfaces 10/1 and 10/2 are assigned to Instance2. If an LA
channel is created with interfaces 10/1, 10/2, and 10/3, instance1 is not
restarted. However, the Management Service shuts down Instance2, assigns
interface 10/3 to Instance2, and then restarts Instance2.
If you remove an
interface from an LA channel, the changes are stored in the database, and the
interface appears in the
Settings view when you add or modify an instance. Before you delete
the interface, only the channel that the interface is a part of is listed.