Link Aggregation And Lacp Configuration; Basic Concepts - HP V1910 User Manual

Link aggregation and LACP configuration

Ethernet link aggregation, or simply link aggregation, combines multiple physical Ethernet ports into one
logical link, called an aggregate link. Link aggregation delivers the following benefits:
 Increases bandwidth beyond the limits of any single link. In an aggregate link, traffic is distributed
across the member ports.
Improves link reliability. The member ports dynamically back up one another. When a member port

fails, its traffic is automatically switched to other member ports.

Basic concepts

Aggregate interface
An aggregate interface is a logical Layer 2 or Layer 3 aggregate interface.
NOTE:
The device supports Layer 2 aggregation interfaces only.
Aggregation group
An aggregation group is a group of Ethernet interfaces combined together. When you create an aggregate
interface, the device automatically creates an aggregation group of the same type and number as the
aggregate interface. For example, when you create interface Bridge-Aggregation 1, Layer 2 aggregation
group 1 is created.
You can assign Layer 2 Ethernet interfaces only to a Layer 2 aggregation group, and Layer 3 Ethernet
interfaces only to a Layer 3 aggregation group.
NOTE:
The device supports Layer 2 aggregation groups only.
Aggregation states of member ports in an aggregation group
A member port in an aggregation group can be in either of the following aggregation states:
Selected: A Selected port can forward user traffic.

Unselected: An Unselected port cannot forward user traffic.

The rate of an aggregate interface is the sum of the selected member ports' rates. The duplex mode of an
aggregate interface is consistent with that of the selected member ports. All selected member ports use the
same duplex mode.
For how the state of a member port is determined, see
aggregation
LACP
The IEEE 802.3ad Link Aggregation Control Protocol (LACP) enables dynamic aggregation of physical links.
It uses link aggregation control protocol data units (LACPDUs) for exchanging aggregation information
between LACP-enabled devices.
mode".
"Static aggregation
205
mode" and "Dynamic